I have no advice but I know how you feel I'm 27 weeks and it just is getting harder for me I feel more fat then pregnant I'm breaking out on my back and chest I have never broke out before . But threw all of this yoy just have to know something amazing is to come in the end and then you get your body back just remember this is only temporary :)
Embrace it. You're pregnant. Your body will change, its inevitable. Stay active, eat healthy, gain a healthy amount of weight ur doctor will tell you what's healthy in that area. In a nutshell eat and stay healthy. Your belly will grow to the size of your baby regardless. Lots of moms miss this time in their life once it's over and you're taking care of a newborn. Take it day by day