Sharp shooting pain under my bottom right ribs...?

i've gotten this a few times now. it seems to happen when i get really stressed. sometimes it last for only a few hours other times it's lasted for days. when i inhale i get a really sharp pain under my bottom right ribs and the deeper breath i take the farther up my side the pain shoots. it seems to be a little more bearable when i stretch out breathing. What could this be? should i got to a doctor??? any remedies?