Pms or Pregnancy?

Ch

So I think my period is due either today or tomorrow,

I had sensitive nipples and cramps for most of last week but 2 days ago my symptoms changed.

My cramps reduced, my nipples aren’t sensitive anymore and I have small light brown spotting.

I feel like now my period won’t come. Sometimes my symptoms go away for about 12 hours before AF but this time they have stopped a few days before (except the spotting and very light cramps).

Anyone experience anything similar?