Maybe tmi..

My husband and I have been having sex since I was 7 weeks postpartum, I am now 4 months postpartum. I have never bled or anything like that, just a little sore the first couple times. Well yesturday we had sex and I went pee about an hour later and wiped and had some pink. Anyone else experience this ? We don't use condoms since we are married and aren't sleeping with anyone else. I am not on birth control either. We're strictly pull out.