late period?

my period is late by like a week or so, and ik i’m not pregnant.

i had some weird spotting a couple weeks ago, like a light pink bleed for a few days. i don’t know if that’s somehow related to this.

i’m still having all my pms symptoms, just no period. it feels like i’m cramping sometimes but without the bleeding.

the only factor i can think of is that ive up my running mileage per week by a lot.

help?