Sex with my husband

Ladies im two months postpartum and once i gave birth i was skinny, but within 3 weeks i got a little over weight and today i had sex with my husband and i felt so insecure do to the fact that im fat now, the whole time while having sex i was thinking about my body and I didn’t enjoying the sex at all and I didn’t even cum😫 today I started drink some green juice in the blink of an eye i got fat and now im desperate to go back to normal. Can someone relate?