Just don't feel good enough..

We have been thougher for almost 2 year and married for 3 months but I can't shake this feeling that I'm not good enough for him anymore.. We got engaged after we found out i was pregnent we Sadley lost our baby at 14 weeks but thinks moved onto the wedding so I Porued all my effort into that admittedly gained some weight.. I have allways been on the plus size side anways, we have been having a lot of problems trying to have our rainbow baby and I feel that beacuse I can't give him a child month after month that its pushing him away and that if he has jist married anyone else he would have a child so I guess I feel very guilty and useless