Post egg collection

CP
Had sugery last fri 7/8 had no eggs but plenty of follicles so not sure what to think. Had no bleeding just pain when using the bathroom which is now gone. My question is now have had heavy bleeding from thurs 13/8 not sure if this is just from surgery or is it my period? My fs advised would be 20/8 but could be late to to injections so am a little confused. Any thoughts?