Gaining weight

I started mono-Linyah recently (I’m on my fourth month) and the last few weeks I feel like I’ve gained weight, mainly in my stomach area. I haven’t noticed any change in my appetite since starting the pills and I’ve even been eating healthier than ever lately but I feel like the weight is still coming on! What should I do? My body finally adjusted to the pills so I would hate to stop. Do you think it’s temporary weight gain? What do you think I should do?