Late...

So I’m now 5 Days late. The first time since ive been back was on the 22nd and it was protected. I’ve taken two tests and they were both negative. But I’ve still been crampy the whole time. After having sex and that’s been 3 Times I still get crampy. But idk what to do if both tests were negative. Advice?. Once I get back to my base they’ll do a drug/pregnancy test. I’m just not sure what to do....