Frustrated with my body...

Jenn • 29 yo - 13 years with DH with multiple angel and furrr babies. Lap surgery for ENDO - 10/14. Expecting our 1st in 2/16💕
I huI have severe food and chemical allergies and have trouble keeping on weight. When I wasn't gluten/lactose free, I had crazy horrible periods and could never hold a pregnancy. Now I can't seem to hold a pregnancy because of my weight. (BMI=20). My dh and I have been together for nearly 12 years and I'm 29 at the end of the year. I get so upset hearing about how easy it is for other people, but really I just blame myself. If you could just eat more... Stress less... If I hadn't been so protective against pregnancy in tour younger years... Between our 8 siblings, we have 17 nieces and nephews with 2 on the way. I know most of us struggle with bfp jealousy but does anyone else struggle with the weight issue?!