So lately I have been eating a lot and drinking a lot and my boobs hurt a little... my period was a week late but when I did have it it was only a day long and really heavy.. so I took 2 hpt both negative... could I possibly be pregnant?

I don't know your situation. I would recommend going to the doctor, but... it was probably a chemical pregnancy, where you miscarry before the pregnancy is detectable. A lot of women experience it.