The young woman from New Jersey who spent Thursday night locked inside a Lower East Side nightspot told The Post Friday she’s “pretty sure’’ her drink had been spiked.

Therese Hipolito — a 20-year-old law student who said she planned to sue the bar — insisted, “Whatever happened last night, I’m not that kind of person.

“I would never be in the city just drinking. I was at a friend’s birthday party. I had one shot and one glass of champagne. And the last thing I remember, I go get a slice of pizza with my friend and we sit back down in a booth [at the bar] and that was my last clear memory.’’

Hipolito. who lives in Flemington, NJ, said she woke to find herself lying on the floor of the bathroom of Boss Tweed’s on Essex Street.

“How do you not notice someone sleeping on the floor of your bathroom? There are only two stalls,’’ she said, adding, “I’m going to sue them.’’

She couldn’t get out of the bar because the door had been locked for the night.

She was freed about 9:20 a.m. Friday after people on the street heard her screaming through a locked gate.

Speaking of her night behind the bar’s bars, she said “it’s really not like me – it’s so inappropriate and trashy.’’