Wellbutrin and Lexapro question:?

I have been taking wellbutrin for depression for about 5 months now. Along with weekly therapy. My depression has not lifted, (ie. crying spells, death thoughts, extreme lows) Lexapro 5mg (10mg broke in half) added to regimen 2 weeks ago. I now feel on top of the world, elated, happy for the first time in years(almost too happy) spent some money on something I could have done without. I was down to 1 pack of cigs a week..now im back too 1 pack a day. other side effects include anti-atic, waking in middle of night unable to go back to sleep, trouble trying to uninate (have to concentrate to go). I dont want to go back to the eeore depression but am I entering mania?? Oh, also crave alcohol, whats up with that?