uncomfortable with myself

i am a FTM, currently 33 weeks & 4days. lately i have been feeling very uncomfortable with my body, don't get me wrong i love being pregnant and seeing my belly and feeling my baby girl kick and move around. but i have gained almost 40 pounds since the start of my pregnancy and it is all in my lower half, on my butt and thighs and legs. it's honestly ridiculous. usually in general when i would gain weight before i was pregnant that's where my weight would go... i've recently got stretch marks on the back of my knees and in the inner part of my thighs. i was really discouraged for about a day. i cried. there are some days i feel so ugly and fat and other days i feel completely beautiful. any other moms feel like this or something similar ?