Pain after M/c

My husband and I lost our 2nd angel baby at the beginning of January. I was able to pass our baby naturally (was only around 7 or 8 weeks), and we waited the recommended 3 to 4 weeks before being intimate. Since we became intimate again, there are many points during our times when it feels like he is hitting a bruise or something inside. Has this ever happened to any of you? I hate going to the doctor, but should I? Not sure what to do, asking for some guidance.