Cold bath symptoms and conditions

I have been taking half an Ambien (5mg) each night for roughly 3 months. The other day I woke up, and I just felt out of it. Like I was dreaming or something. I started to think I was getting sick, and I think I had a panic or anxiety attack. I'm not sure those words describe what I felt correctly though.

It was like I was in a nightmare. My fingertips and limbs started to get cold, and I couldn't feel anything. I started to sweat really bad. My chest felt really tight. I started to hallucinate a little, and this caused me to freak out even more. It was like I completely lost my mind for a few hours. I just remember thinking that something snapped in my head, and I was never going to be the same.

I called my husband and told him I went crazy, and I was afraid I would never be the same. I told him about the hallucinations, and he thought I might have a really high fever. I tried to take my temp, but I couldn't get my mind to slow down enough to do it. I would start, and then I would think I need to take a cold bath to lower my temp. I would then think of something else and get sidetracked.

My mind was freaking out so fast that I could not keep up. I was talking to myself to try to tell myself there was nothing wrong. I was trying to over-power my thoughts, but this made me think that I was in fact insane. So I would tell myself to shut up. It felt like I was battling myself or my own thoughts at least. My husband came home, and I went to sleep. I woke up feeling just fine a few hours later.

I have been so scared to tell even my Doctor. I am no longer taking the Ambien, and I feel fine. I am just embarrassed by the whole thing, and I don't want to tell anyone about it.