((((rainbowzz))) Now is not the time to worry about your overall weight. Try not to worry about it at this point in time. You're going to have a baby!!!

Yes, your body will begin to naturally shed the extra weight, and maybe it will continue and help you lose the remaining gained weight also... IDK. Keep eating right, and doing what exercising you can... doing what you know to be good to do...
It isn't a permanent issue, though years seems like it. Your meds might change, or you go off them altogether, you body will shed the excess weight over time as you keep good effort... but right now focus on what a great mom you are working on being! I think it's kewl.