I'm 17 weeks and belly is pretty big. My husband has noticed a big change in me, says I'm extremely swollen and tight and makes sex hard to last more than a few pumps. He can only last a couple minutes if I'm on my back, but even with a pillow under my hips, I'm having a hard time breathing. The only position I'm comfortable is on all 4, however my husband lasts seconds in this position. He wants numbing lube too last longer, but I'm questioning of this is safe. I don't see my doctor for a couple weeks so can't ask her.