BFN 2 days ago. Still no AF..anxiety

Shari
I tested on Monday cycle day 28 and BFN.. I usually get my AF on cycle day 30-32. Just wondering when to test again. Thought for sure I had implantation bleeding lastThursday b/c I woke up to some watery blood. Idk. The waiting is driving me crazy. Last time I didn't get a positive till cycle day 35 but that ended sadly in a mc. Would Friday be too early?