Confused!!!

Jo

So I am 19DPO but all my testes in between were negative. I have no symptoms except 5 days late period which is common for me as I have PCOS and hypothyroid. But after Ovulation we had sex twice and both times we saw blood when we wiped after sex. Is it a sign? Or something serious ? Does having PCOS give false negative ? Can you please share your experience of TWW and BFP.