Secondary infertility

I am curious if anyone else has experienced this. Right after I had my son, they tried to deliver my placenta but it wouldn’t come out so they had to manually remove it, meaning the doctor stuck his hand up there and scooped it all out. It was the worst pain I’ve ever felt in my life, it was worse than actually pushing my son out or having contractions. Anyways I didn’t think anything of it at the time because the doctor said he had to do that to get all the placenta out. Well I was reading an article the other day that mentioned if you have scar tissue around your uterus due to c-section or placenta problems, it can cause fertility issues down the road. My husband and I have been TTC for about 8 months now with no luck. Could it be because of that?? Has anyone gone through this before? Thanks