36 weeks pregnant and so annoyed with my sex life

So I know its temporary but right now I'm 36 weeks pregnant I have gained so much extra weight so havent felt sexy but I still have my needs too. Well everytime me and hubby try to have sex it hurts so bad, I get contractions like crazy and it's hard to find a good position. Well we tried again lastnight and finallyyyyyyyyyy got into a decent position and it started for once to feel good and then my man cums. All that work in finding a good position that's comfortable and to finally get it to stop hurting and get me in the mood and boom over. I know it's because we dont have sex frequently but it makes it hard to want to because of this. And now today I'm left with cramps and back pain from it. It's not even worth it for me but I try to still for his sake. It sounds selfish but I'm ready to have this baby and get my body and sex life back!!!