Any advice ladies? AF due 9/14?

Ashley • Mommy of soon to be 6. Living with PCOS.
Hey ladies. So I'm gonna try to post again for some advice. Last AF was August 12th, was also my period during my lat pack of birth control pills before ttc. Two weeks into cycle i started some light brown spotting, mostly only when I wiped or was checking CM and last about 2 weeks. Now if I was on my pills still period would have been due around 9/7 but Glow was saying 9/14 (I also have pcos). Took 2 tests so far and negative. Should I be even trying to test for pregnancy or maybe go back to OPK'S to keep trying? Any advice would be helpful.