I've had weight gain from abilify myelf so that could be what's going on with you. I may be tapering off abilify in the near future but if my depression or other symptoms become unbearable I'll definitely go back on it. I'd rather fight the weight with a disadvantage than live in misery or worse, return to the dark place I was before.

Stay strong and try to only change one thing at a time. It's possible you're just adjusting to not having the abilify but if this gets out of control I highly recommend getting advice from a doctor. I've tried modifying my own meds before and so far it's never ended well. As suspicious as I get of doctors sometimes I have to give them credit.