Bipolar weight loss.. and gain

I lost about 35 lbs in 4 months just kicking *kitten* and never faltering... and then, i guess i hit a wall and everything crashed down, including my diet. i'm bipolar (obviously, my title) and my dr put me on new meds. ever since taking the new meds, i've started eating at night and everything is out of control! i can't tell if it's my own perception of life or the meds.. but i'm not working out enough and i'm not eating right.. gradually i've started getting more active but i have to really push myself. and the eating is the worst. i don't want to eat anything all day.. then in the evening, i just want unhealthy things.. like the healthy good things i wanted before are bland and tasteless.. i know i used to tell myself, the less of the sugary fatty stuff you eat, the less you crave.. the better the other stuff tastes... ugh.. how do i take my own advice again? i stopped logging for a month. thank god i only gained 2 lbs but i think i lost some muscle.. i'm paranoid... so that's a good thing.. But i've been fighting for my physical and mental health.. getting back on.. and being here is a huge step for me too.. but i'm so afraid this medicine is just ****ing up my inhibition at night. anyone else have these issues with medication or other?