Possible trigger *Positive and negative test

Alexis • N.E.H 01/01/16 💗👧🏻 A.O.H due 01/2019 💙👶🏻

I took two IC today which had shadows of a line, wasn’t sure if it was there or not so I bought some first response. I got another positive on the line test but a negative on the digital. I’m so confused. I don’t know what to think. My cycles have been 30-35 days, but was recently diagnosed with PCOS. And now all the sudden my period is 13 days late this month. Should I trust the positive line test? Can PCOS cause falsies?