My husband is having trouble lasting.

We've been having regular and lasting sessions up until recently. He doesnt last long and its bothering him. I feel bad because he does. I've reassured him that it doesnt bother me and I'm trying to help him work through it. We stopped drinking alcohol about two months ago, because I'm 8 weeks pregant. He has an occasional drink. I read that quitting like that can cause difficulty. I was wondering if my cervix was lower and softer and if that causes anything? We havent had difficulty until after I got pregnant. If anyone knows any causes, tips, or strategies please comment! Thank you!