I don’t know what to do...

I am young and fairly small, I had my son all natural with no medication. He was 8lbs 4oz. I lost a lot of blood and had somewhat of a traumatic experience after birth. Ever since then I have had a HORRIBLE time trying to be intimate. The thought of sex or being touched almost angers me. I don’t like the feeling nor the thought of sexual activity. My partner has discussed this thoughts and concerns with me but I don’t know what to do to help our sexual relationship. Has anyone experienced this themselves or know what I could do?