Sleepwalking

Hello, I've never posted anything like this before but I had an experience a few days ago that I need advice for but cannot find where to get some.
I'm a 20 year old student, who works full time. I am a very stressed out person, just by nature and have pretty bad anxiety. I have had a few panic attacks but I don't take any medication. I'm just a really nervous frazzled person I guess....
Anyway, I was on vacation last week and I had been drinking some alcohol and having a lot of fun. My last night I was drinking a lot, so my sister took my back to the hotel room and put me to bed at 1:00am. The next thing I remember is waking up in the hospital with a tube down my throat and cords attached to me everywhere. Apparently I had slept walked to my balcony, climbed over it and jumped off. My balcony was 3 stories high so a good 30 foot fall. I was lucky and only had to get staples on my head and a lot of cuts and bruises. But this really scares me... What if the balcony was higher? I don't want to do any more dangerous things while sleepwalking. I was wondering if anybody had any advice for me, or any reason why I did something so crazy while sleepwalking. Thanks!

Thanks for the advice Larry, but they gave me blood tests and checked my body and there were no drugs but alcohol in it. I thought too that maybe somebody slipped me something, but I think it was just pure sleepwalking.