Brown bleeding two weeks after csection

Janet • First time mommy to Christopher born September 6.
In had a csection about two weeks and the heavy bleeding stopped for a few days. However, today I had some minor cramping and then passed several large brown blood clots and heavy brown blood. I read on different forums that this is normal or could be a sign of an infection in the uterus - so not sure what to think? Gonna call my OB and ask, but was curious if anyone experience this. Thanks