Britney Spears is sharing details regarding her recent wedding to Sam Asghari as reports surfaced she fired her security team after a "chaotic" wedding day.

Spears, 40, took to Instagram on Tuesday and shared that she didn’t have "one sip of alcohol."

"I can’t drink a lot … true story – the 13 years of being in the conservatorship I was drug tested at least 3 times a week," Spears wrote. "I don’t even really like alcohol."

Britney Spears is interviewed by Jay Leno

Britney Spears took to Instagram on Tuesday to share that her brother, Bryan Spears, was never invited to her wedding. (Paul Drinkwater/NBCU Photo Bank/NBCUniversal via Getty Images)

The pop star went on to claim that her dad Jamie Spears had a drinking problem and "would go to the bars every night."

BRITNEY SPEARS' EX-HUSBAND ATTEMPTS TO ‘CRASH’ HER WEDDING TO SAM ASGHARI

"Is it the powerful feeling dad got my whole life in literally making me feel like absolutely nothing," she wrote, addressing her older brother, Bryan Spears, 45.

Her detailed post then shared that during her recent Vegas trip, she drank alcohol again, claiming it was her "first vodka and Sprite."

"I literally drank half the cup and suddenly my stomach went into a knot so my friend finished the drink," Spears wrote. "I basically couldn’t leave my room for 2 days because it upset my stomach."

Britney and Bryan Spears

Britney Spears and her brother attend the MTV Music Video Awards in 2000. Britney shared an explosive Instagram post claiming her brother did not let her drink alcohol for 4 years. (Photo by Dave Hogan/Getty Images)

Britney said she is a "little bit bitter" to her new found alcohol intolerance: "I wish I could play that bad girl my family wants me to play but honestly… I’m too old for this sh-t!"

The "Toxic" singer then called out her brother Bryan and shared he was not invited to her wedding.

BRITNEY SPEARS' MOM LYNNE SPEARS SHOWS SUPPORT AFTER NOT BEING INVITED TO THE SINGER'S WEDDING

"You were never invited to my wedding so why even respond ??? Do you honestly think I want my brother there who told me no to a Jack and coke for 4 years … what ???" Britney wrote, citing her residency in Las Vegas from 2013 to 2017.

"If we were going to drink together at the wedding and play the classy roles for the children like you and [our] mom [Lynne Spears] do as you literally hid coffee and alcohol when I would come home," Spears continued, adding, "you hurt me and you know it !!!"

Jamie Spears

Britney accused her father Jamie Spears of having a drinking problem while she was under her conservatorship. (Nick Ut)

Britney credited Bryan as being her "blood," but is not tolerating his behavior.

"I know you’re blood and yes blood runs deep but no family of mine would do what you guys did to me," she wrote.

Bryan’s girlfriend, Amber Lynn Conklin, shared on the couple’s joint Instagram account that his daughter graduated from elementary school the same day as Britney and Asghari’s wedding. The post has since been deleted.

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"Watched our little munchkin & Vice President of 5th grade become a middle schooler yesterday! We love you Lexie baby and SO proud of you," Conklin captioned the post before addressing their absence from Britney’s wedding in the comments.

"Bryan felt terrible having to choose but he had to be there for his daughter and sent his love to Britney x1000000," she wrote. "We are so sad to miss such an important moment but so so happy for Britney and Sam’s Marriage!"

Brtiney and Sam are set to be husband and wife on Thursday, June 9

Britney Spears and Sam Asghari held their wedding ceremony at her Sherman Oaks home last week. ( J. Merritt)

Amid her explosive Instagram post, a source tells Fox News Digital that Spears’ attorney Matthew Rosengart was incensed and terminated the pop star's security team. The move came after her ex-husband, Jason Alexander, crashed her wedding with Sam Asghari last week.

TMZ claims her entire security staff was dismissed, and Spears has hired a whole new team.

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Alexander pleaded not guilty on Monday. A judge has set his bail at $100,000. The judge also ordered that Alexander must turn in any firearms. It is unclear if he has any. 

Alexander was arrested Thursday at 2:32 p.m. PST and booked the same day at 7:32 p.m. In addition, an emergency protective order was requested by Spears and Asghari's representatives at the time, and it was forwarded to a Ventura County superior judge who previously issued a no contact order. 

Britney Spears' ex husband Jason Alexander attempted to crash her wedding

Britney Spears' ex-husband, Jason Alexander, crashed her wedding, which reportedly led to the pop star firing her entire security team. (Getty Images)

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On Monday, the judge ordered Alexander to stay 100 yards away from Spears. The order is in place for three years.

Fox News' Mariah Haas and Larry Fink contributed to this report.