Feeling hung over but I don’t drink

So went to a party the other day felt fine all day I was in bed before 10pm, but then yesterday all day I felt hungover like I had been up all night partying and drinking meanwhile I just drank my water that I brought with me. Well fast forward to today I’m having symptoms of withdrawal like headaches,nausea, diarrhea, irritability and sweats. Scares me what if someone slipped me something and I had no clue. How do I find out?and am I being paranoid?