First time experiencing cramps? Af not due till 1st of March.

I've been having cramps in my lower stomach for 3 days now. There hard to explain. It's like a pinching kind of twitching weird pain? It's not exactly a pain as such. It's more uncomfortable and achey. Anyone else having the same? I'm really tired and moody and my boobs are itchy and sore? Maybe I'm just going insane! Baby dust to everyone!