Iphone hacked?

I was watching a movie on a stream site (probably not the best idea, i know) and my phone frozen for a second so I tapped the screen a few times then all of a sudden the url was clicked on and random letters started being typed. I then closed out of safari, turned my safari off then opened it again and I was scrolling on something else like Yahoo answers or here my phone started zooming in and out and a random user name was clicked out. After that I cleared my safari cookies, data and history. I also changed my email password and AppleID stuff. However, I did reilze I was on my college's wifi and had my bluetooth on (if those things may play apart in it) was it a hack? Or was it someone messing with me via bloothtooth/wifi? My phone is not jailbroken.