pp bleeding vs period?

How to tell the difference? I’m 8 weeks PP and my bleeding had lightened a few weeks ago, was very dark and minimal. Had a few days when it would stop, and come back. About two weeks ago it started up red again but super light, minor cramps. Now it’s pretty heavy and red with small clots awful cramps for about a week. If it’s my period would it last this long? I am taking birth control since 2 weeks ago. Super confused. OB is 0 help.