Pregnant orgasms

For some reason I haven’t been able to orgasm when having sex with my husband, it’s been a month and I can’t find the right position anymore.

My belly is to big to just jump on top, so I’ve been trying it backwards and for him it feels good but I can never reach orgasm before he does, and when he does it basically all down hill because he almost instantly gets soft.

I need tips ladies!! I’m so desperate.