has anyone ever had this happen? i took my ambien last night as usual at 10, and i read for a couple minutes until it kicked in, and then i tried going to sleep. i didn't get to sleep until three or four. it was agonizing. i felt nauseated, i was hallucinating, i started freaking out at one point because i thought the hallucinations were hurting me. i don't know exactly why, but something just felt really OFF about me. i didn't feel right. my chest was hurting, my heartrate felt like it was through the roof... i kept having to get up and switch the light on, because i kept seeing things. if i looked across the room, it looked like everything in my room was flying at me. i was pacing all night, and i feel horrible today. not to mention i'm still going through horrible withdrawal. it really freaked me out, and i still don't really know what happened. this ever happen to anyone?