Return of PP Bleeding??

Ke
I'm 5 weeks PP. Over the past few days I've noticed a significant return in PP bleeding. 
I'm not soaking pads, but I do have to change them multiple times a day instead of just morning / evening, and I'm noticing small clots whenever I use the bathroom. 
I'm exclusively nursing, so I'm not convinced I've gone back on my period. The bleeding is thin and bright red. I see my OB next Wednesday, but I'm wondering if anyone has thoughts based on personal experiences.