Wasn't sure where to put this..

We're not TTC, but are planning to start in the next month or so. We're using barrier methods currently and I'm 4 days out from my period. Yesterday and today I've had period like cramps and increased CM. I can't for the life of me remember CM being normal before my period or not. I'm thinking my period is coming pretty early OR dot dot dot.

I can't believe I'm two kids in and still have no idea how my body works. Any commiseration? Stories of early cramping and how it turned out re: AF or PG?