I missed your first post and so went back and read it. Your description of how you feel is familiar with me. Blah! Then I broke up with my first love and became very depressed and considered suicide. Life was no longer blah. My feelings were overwhelming. This was back when there were no medications for depression and anxiety.
I started into psychotherapy and over time learned how to deal with the overwhelming depression but not the anxiety or the blah feeling. The first meds I took were the MAOs which I'm guessing are the ones you took years ago. Once I took them for awhile the side effects of sleepiness and fog lessened and I did feel less depressed but they didn't really help over time. I did feel more sedated than up lifted.
Then the new meds came in and they were a god send. While I was in therapy I learned that I was probably depressed my whole life; even as a child. My mother was chronically depressed and spent much time in bed and unavailable to her children. I learned that chronic depression changes the chemical make up in our brain and that we can continue to be depressed after the initial cause for the depression is gone. That blah feeling is depression.
I've taken several different SRI type meds over the years. For me, they stop working after a few years on them and the doctor switches me to a new one. I've gone off for a year or two at a time but the depression always returns.
I've taken Wellbutrin, which is not only an anti-depressant but also an anti-anxiety medication. I don't remember whey I quit. It was probably because it stopped working for me. I don't remember having any negative side effects and I do remember some of the positive ones that others have mentioned.
I recommend that you give it a try while continuing to keep in touch with your doctor. Remember that it takes a few weeks for it to take affect. Your doctor can tell how long that usually is. So continue taking it to give it a chance to work for you. If it turns out to not help you, try a different one. Anti-depressant and anti-anxiety medications make a noticeable positive difference in my life.