Thanks for the replies. The good news is, I stopped the new med (only been on it a week so not tapering), and felt almost back to my normal self today. Now, my normal self is on 300mg Wellbutrin daily and is still depressed and unmotivated and tired and anxious...not great, but at least much better than how the new med had been making me feel (like I was just going to start crying randomly for no reason at any given moment).

Seeing a new psychiatrist in a couple weeks. Hopefully they'll have an idea of something else I can add to my Wellbutrin that won't make me prohibitively tired or cause sexual dysfunction. Fingers crossed.