I wonder if heroin addicts get this?

Here's the thing. I've been on certain medication for just over a year. Last week my doctor and I decided the time had come to stop taking said medication. She warned me there may be certain side-effects for the next couple of weeks.
So I asked for Thursday and Friday off work, just in case. I couldn't really explain to my boss the real reason which was that I couldn't really be sure how I was going to be for those two days, i.e. "Well, Boss, there's a distinct possiblity I may become psychotic but I can't really be sure." So I just gave him the form and didn't elaborate.
He gave me Friday off but I had to be in work on Thursday. It was a very long day indeed. The good side-effect is that for the first time in many, many months I didn't feel completely drowsy all day, although let's face it there is something to be said for going through life half-asleep. On the other side of the coin, I developed a screeching headache accompanied by nausea and what can only be described as a lot of noise in my head. But I made it through the day and spent Friday and the weekend happily doing as little as possible.
On Friday I began to get these odd little episodes where it felt like the world was tilting, interspersed with the sensation of being wrapped in a jellyfish that would squeeze different body parts at different times. It felt extremely odd so on Friday evening I got Hubby to help me get rid of a bottle of wine or two. I figured if I was half plastered I'd be dizzy and semi-numb anyway and in fact, I was right, although I'm not sure the hangover on Saturday was altogether worth it.
By yesterday the giddiness seemed to be abating although my mood started to take a serious nose-dive.
Today, being Monday, I'm back at work. Perhaps I should have asked for more time off.
The giddiness has turned into round-the-clock dizziness and I'm quite surprised I haven't actually toppled over yet.
But it's the mood that is causing me the most problems. Yes, I'm feeling down, but even more than that my fuse has disintegrated completely and there have been a few times today where I could actually visualise myself throttling / punching / dismembering certain people. Not great for harmony in the workplace.
Let's hope the next couple of weeks pass uneventfully and without me falling apart completely.
But just so you know, my favourite cake is carrot cake.