Cramps cramps and more cramps?! One week before period is due

Alexa

We have been trying to conceive our fourth for four months. I am currently somewhere around 7 DPO and for the past 2 1/2 days I have been having nonstop menstrual type cramps. I have tested, which I know is stupid because it's early and I'm pretty sure it's negative. I guess my question is, is it normal to have cramps an entire week before my period is due? If I were pregnant, is it normal to be cramping like this? I'm just beside myself because I want it so bad, but I don't know if this is a good sign or not