My stomach is hard from the bottom is that possible i'm pregnant?

Depends: It depends on your age and sexual activity level. If you are a female of child bearing age and have had sexual intercourse, you could be pregnant. Typically you would miss your regular menstrual cycle. You can get a pregnancy test at the drugstore to find out. If you think there's something wrong, see your primary care doc in a timeframe suitable for the severity of the problem. Hope this helps!