Clear Blue Digital Positive, FR Pos and Bleeding? Help!

I have had positive pregnancy tests with 4 different brands. Faint lines. Clear blue digital was said "not pregnant" yesterday and the day before even though FR had a faint line. This morning Clear Blue digital test said "pregnant." My period was due yesterday and I got some light spotting lady night. Still bleeding today but it's light flow off and on. I'm so confused! This afternoon I took another clear blue digital test and it said "not pregnant." I know it's better to test in the morning and it may just be a change in hcg level from morning to afternoon. What does everyone think? Could the bleeding be normal? Am I pregnant?