Help please!

I had a really horrible experience on Sat night. Went to stay at a B&B as I was planning to do a cycle race yesterday morning and I wanted to be close by to the start. I was on my own and this was supposed to be my first outing of independence since the exN hence me going on my own (woman needs a man like a fish needs a bicycle kind of mentality!). I met some people staying there and had a few glasses of wine with them while they were having a barbequeue. The next minute I felt very out of it and started experiencing extreme paranoia and I was convinced they were out to kill me! So much so that I was hiding in the bushes by the river to get away from them. It was the most awful bizarre thing I have ever experienced. They managed to find me and put me in the bath and then to bed but I cannot remember anything after the hiding episode. The manager even called my mom to see if I was on any medication. All I am currently taking is a mild antidepressant which I have been on for approx a year with no side effects and I take them in the morning anyway so it is unlikely that it would have interacted with the wine. The only thing I can think of is that someone spiked my drink but the people staying there seemed really nice, I can't see any of them doing something like that and physically I am fine - no one did anything inappropriate to me. I am just really freaked out by the whole thing. I went for some urine tests yest which all cam back neg but apparently there were two things they couldn't test in that batch so I am going back to the doctor today to have the other two done. Just very shaken by the whole situation - this was supposed to be my whole new start to freedom and instead it has just turned into a nightmare. The worst part is these people don't know me so they probably think I am some drug-crazed maniac! Have any of you ever experienced anything like this?