Slight cramping, frequent urination, 5 days late for AF but 2 negative hpts..?

I am now 5 days late. I have noticed more frequent urination and some slight cramping recently. I am hoping that in fact I am pregnant..I have been trying to conceive for awhile now. I took 1 hpt 2 days after AF was due and got a negative result. Then i tested again yesterday and again negative. I am buying the cheap 99 cents store brands but I heard the work just the same.. AF is always on time for me and consistant so when she didnt arrive this month it got me wondering..could i still be pregnant even though 2 negative hpts? Please share your thoughts and stories. And send some baby dust my way! Thanks everyone!