BFP before AF but still worried

Suhaifa • Pregnant with Baby #2 | Attempting VBAC
Hi everyone 
I received my BFP about 5 days before AF. I got a clear positive with the early detection test and positive with ClearBlue Digital. The normal tests show a faint line but it's not getting super dark (AF is supposedly 2 days away).
I'm super excited but also worried. I have so many thoughts and questions. Could the normal test not be getting darker because it's still too early? Is this another chemical?
I am slowly freaking out. I have mild cramping. Could it be AF? Could it be uterus expanding?
Any advice?