I feel disgusting

I’m sitting here feeling terrible about myself to the point I may actually cry. I’m 5 months pp and me and my SO were messing around earlier. He started kissing my tummy and all I could think about was my saggy stretch marked stomach... to the point I ended any possibility of anything else happening. I’m actually a lot lighter than before I was actually pregnant ( about 50 pounds) but I just feel so self conscious that I’m not the same any more. I know he loves me and we’ve been together a long time during which my weight had been up and down. I just feel like I’m pushing him away and don’t mean to. He is a

Lovey husband and amazing Dad. Any advice as to how I can improve my self esteem a bit please.