I am so confused. Am i Pregnant?

I have a 28 day cycle with my period lasting 7 days. About a week after my period ended last month(april) I had sex once. I began to havwe cramps about a wk after that, i thought i was have pre-menstrual cramps which is normal for me. However, this month(May) My period came on time, but i was very weird, it was light,very light compared to to whats normal for me, and it only lasted 5 days, not the 7-9 it normally takes. I have been totally fatigue, breast hurts and i am still having abdomianl pains. I took two HPT and they both came back negative. Could i still be Pregnant?

[Pcogale]

If you are having sex there is always the chance of getting pregnant.

However with the timing that you've described, there is a high chance of being pregnant.  You ovulated around the time you had sex.  Did you use protection?

Some women have a very light period when their periods are due even though they are pregnant.

Just do a pregnancy test.  You can have light periods for other reasons.