Please Help, Please Read. Is there any chance that i could be pregnant ?

Okay so I was 12 days late on my period and it comes like clockwork so naturally I thought that I was going to be BFP (because we’ve been TTC after i lost my lil nugget in august) I took a couple of test but they were negative because it was too early..after those 12 days i got this brownish type blood that only came when i wiped them i started bleeding like a regular period. Is there anyway i am pregnant and just bleeding or? what is some ways to become more fertile?