I was supposed to get my period on the 28th of April, and it is now May 2nd and i have not had my period. I am bloated, have food cravings, a sharp pain in my lower left abdomen, frequent urination, lower back pain and dizziness. I have taken ^ pregnancy tests and they all came out negative. I took 3 of the tests 1-5 days before my period and the other 3 tests 1-4 days after my period was due. Am I pregnant? Please help