Sexual abuse and breast feeding

I won't go into detail. So when I was young I was sexually abused repeatedly for a couple months or maybe a year. I am very sensitive about my breasts and my body since then. I was 12 at the time but I developed ptsd that I sometimes still struggle with. Sexually it was hard at the beginning but obviously I opened up to my boyfriend. We have been together for 4 years and we are now having a baby boy due in October. I really want to breast feed my son but I feel like my ptsd will scare me into not being able to. I don't know how to get over this. I'm scared I won't be able to do it.