I'm 2 weeks late had blood work and came back not pregnant but yesterday I notice I have some super faint blood only when I whipe just that once today the same put a pad on just in case and has a super faint spot but Doesn't get heavy ??? Can this be a.f ?any one have the same my doctors& also said tha maybe I can expierence some spotting and be pregnant but I'm ost any help been through this