I have been having really bad gas pains. it feels like it is building up and it hurts really bad. i feel nauseous, and i'm having really sharp pains.

Severe pain: The severity of your symptoms require an examination by a physician as one can't assume that you are having gas pains. If it were gas entrapment, drinking hot water and applying a hot water bottle or heat to the abdomen helps break down the gas and enables you to pass it. However it's much safer to consult your physician and discuss your symptoms with him/her and follow their recommendations.