I have pain on my right side underneath my rib cage, two inches below my breast, when i breathe in.

Pleuritic chest pain: This is pleuritic chest pain. Had this happen before? Did you sustain a trauma recently? It may be related to a prior lung infection. Sometimes it happens for no reason & goes away on its own. It can be, however, problematic. If you feel you need help, i would recommend a urgent care center or consult your doctor asap, particularly if you have difficult breathing.

Chostrochondritis?: If point tender over a rib or 2 and under the breast & muscle tissue it would b my guess.