Did my son's father rape me?

Me and my son's father broke up back in March. I was still pregnant and I just didn't feel like the relationship was working. I had our son 4 days ago and had to get an emergency C-section. I have been in so much pain and he offered to come help me with the baby. When he asked how I was I said I can barely walk. It hurts so bad. I also have vaginal bleeding and I didn't even know you could have that after a C-section. He told me to go take a nap and he would take care of our son so I did and I woke up to him having sex with me. I pushed him off and asked what he was doing and he said he thought it was okay because he was helping with our son. I said what part of "I'm in pain and can barely walk says I want to have sex with you." I have been in worse pain since that happened. My brother told me I need to go report him to the police now while his DNA is still in me but I'm just so confused about everything and devastated