I've been on venlafaxine for several years now and it has been really helpful. I did find at first I felt quite dizzy and nauseous, but that resolved itself in a couple of weeks. I've never come off it completely, so can't comment on withdrawal entirely, but I managed to drop doses (in a supported, gradual way) without a problem. however I do find that if I forget for 24hrs then I do start to feel funny.
I think you need to talk to your psych really hun, to see what he might be happy to prescribe. There may also be other options you haven't found.