HELP!!

I've been TTC for almost 9months now. Using glow I had sex before and after my peak ovulation day. Also every other day during ovulation as well. It told me that my AF was supposed to begin two days ago. So I chose "period didn't start today" and it moved it to beginning tomorrow. My boobs are kinda sore, and I've been having this upset stomach for 2 or 3days now.... Saturday night I took a PT and it was a BFN but was I too early??? And do you think I'm tricking myself into thinking this could be pregnancy or does it sound like it could be AF?? Someone please help!