OPKS vs pgt need answers

Natalie
took ovulation test this morning and got a faint test line tested in the afternoon and nothing . Could I be pregnant I am going to do another 1 in the morning and see what happens .my fertile window started 6 days after my af on the 7th day I got what I think was implantation spotting it was in with my ewcm is was a brown with a bit of red in my nickers and nothing since