Can someone please help me? I'm desperate.?

Yes, you should take a pregnancy test. The EPT advertises that it can tell before your missed period. (I think any brand will do.) With both of my pregnancies I cramped like my period was trying to start but it just didn't come, I tested with a Dollar Tree test for my second baby and it was right on point. I was only 4 weeks pregnant too! My didn't start to hurt until later but everyone is different. If you don't start your cycle on time then I would definitely get a pregnancy test! Good luck!