Is a Sexless marriage normal?

I know it’s a weird topic but it’s just something I’ve been thinking about lately. So me and my husband were that couple who had sex Everyday maybe even multiple times if there was time for it. Then we finally got pregnant after trying for about four months and the sex immediately went downhill. We had sex once a month maybe every other month. I was worried it was me gaining weight with the pregnancy or he was no longer in love but I feel like he loves me. Just hearing all my friends having amazing sex all the time makes me feel like maybe we aren’t normal. That something might be wrong.... Any of you gals have experience with this situation? Any advice?