Cramps like a period... but no period.

Lol so I need some support .

My period is 3 days late (which I expected, because I have had massive changes to my exercise, stress levels and diet this month) .

However , The day I was supposed to get my period I started cramping - I keep getting cramps 3 days in , but no period ? .

I don’t feel particularly fatigued, nauseated, no soreness of breasts etc- and I’ve not had unprotected sex at all (condoms) .

Worth waiting it out , or freaking out ?