So late with BFN's

Hi ladies! I am about 10 days late on my period. I've taken about 4 tests (last one of which was taken about 5 days ago) and all have come out negative. I'm not trying to get my hopes up too high yet, but I am heading to the hospital this morning before work to see what they say. Lately I have been exhausted and going to the potty a lot! I'm crossing my fingers that I am! If I am, I would be about 5-6 weeks along!