PP bleeding after sex

Pa

Anyone else have this? We had sex this morning for the first time since our son was born Oct 16 via csection and now this evening when I used the toilet I wiped a light pink, not much tho. I got my first period at 9 weeks PP. Could it just be from irritation? I will also add that this is our first child and I suffered several losses before him, so when we found out we were pregnant in February we were too afraid to have sex. So it has been a long 11 months.