PMS or pregnancy symptoms?

This is my first month TTC.

I've been on BC the past five years, so I have ZERO idea what my regular cycle will be. My doctor prescribed me Provera-10 day to restart my period, and AF came on July 23.

I had a BFN on Saturday (day 28) but still haven't gotten my period. For the past two days, I've had incredibly tender nipples and a uptick in CM. Do other people get these as PMS, or is there a chance they could be pregnancy symptoms? Is there a way to generally tell the difference between PMS symptoms and early pregnancy symptoms?