how do you find the spark again?

When I was pg I was in pain to have sex we still tried, when I was in the mood all the. Time because of hormones he started kind of pushing me away and it made me feel ugly/unattractive, I started wearing more covered up clothing he would ask why, I just gave him and excuse it got to the point I felt gross like he didn't like my body etc, yes I know it was mostly all in my head, now I've had the baby and he's been touchy and stuff but idk I can't help it I tell him to stop I can't bring myself to let him cause in my mind I don't feel very pretty I guess idk. Someone help.