Cramping is actually normal in early pregnancy. I wouldn't give up hope until your period actually starts. DOn't give up hope, when it's your time it will just happen and all will be well. :)
Early pregnancy will feel like that due to the fact that your body is getting ready to develop a placenta and a fetus so therefore your uterus is stretching. Good luck!
If you haven't had your period yet, there is still a chance you could be pregnant (just so you know). Most women feel what they think is menstrual cramps before missing their period. Early pregnancy feels like pms and like your period is coming lol. Good luck!