Period or postpartum bleeding

I’m 6 weeks postpartum and I thought my period started back today. (Postpartum bleeding stopped at week 4) Bleeding was bright red and quite a bit this morning however it has completely Stopped by this afternoon. Could this be my period or possibly pp bleeding? I also normally have horrible cramps with my period and I have had no period symptoms. I am a little worried that the bleeding could be pp related. Last night laying in bed I had some abdominal pain but it was very light. My doctors apt isn’t for another week