Having issues with sex after assault (possible trigger)

I was sexually assaulted in Feb, I was 8 months pregnant. 
Since having the baby, I've been so sexually depressed. Trying to force myself to have sex because in a way, it makes me feel better and more valid as a person. I want to make my husband happy. 
I've also been raped and molested as a child as a side note. 
My husband is having self image issues and it's greatly affecting our sex life. It's also affecting my self esteem because by feeling sexy, I feel validated. How would you suggest I work on this?
He has informed me that masturbation is more comfortable for him. I don't know what to think about that.
I'm sitting here at 1am, crying because I feel unloveable. I know it's stupid.