Wellbutrin and little bit

I started taking wellbutrin sr 150 mg about a week ago. I did okay on it, but my depression wasn't better. My doctor increased my dosage to 300 mg a day (150 mg in am, 150 mg in pm). Since then, I have had 1 panic attack, and I feel like I can't stop moving around. My heart also started to "flutter" a little bit last night. I'm also taking xanax for anxiety, and I admit I've taken more of it the last few days to deal with the anxiety. I think I'm going to go back down to the 150 mg once a day for a while, because this anxiety is killing me.

The first time I went on Wellbutrin, I had a really bad reaction to it. I had insomnia, horrible tremors, apathy, I felt like I was walking around in a cloud. I went on to try other medications. Now I'm taking a combination of Prozac and Wellbutrin and it seems to be working. My depression is under control. I don't have the apathy or zombie feeling anymore, but I do still have the tremors, though they aren't as bad. I get some mild insomnia, but taking it in the morning helped with that, and lately I've found that a little bit of coffee in the morning (not too much, don't need to be MORE shaky) helps with a lot of my side effects. I do have the confusion and concentration issues too. It hasn't caused any severe problems, it only seems to really happen in casual conversation, where I'll completely forget what I wanted to say. It's annoying, but way better than depression, and not severe enough for me to stop.
To those people who are telling others to stay away from this drug, or any drug for that matter, don't forget that there is a reason there are so many different kinds of anti-depressants. Everybody's body chemistry is different, so their gonna react in different ways. Also, the people who don't have issues with side effects rarely go looking for sites like this....
Just something to think about.

I have been on WBXR for about three weeks now. The only side effect I'm experiencing is urinary retention--having to sit for several minutes and really concentrate on peeing before it actually happens. It's so annoying! Can anyone tell me if this side effect goes away with time?