I'm a serious tumbler and have a pretty noticable pain in the pinky side of my wrist. am i getting another stress fracture or sist?

It's possible: If you have already had a stress fracture, you would be at higher risk for another one. This does not sound like a cyst. I would advise to be aware of the female athletic triad of disordered eating, lack of a period and bone thinning. If you have lost your period, you are not getting enough calories and are putting your bones at risk. You should see a sports med doctor to evaluate your wrist.

Stress fractures: ca occur but more typically in the long bones, however a nondisplaced fracture in the wrist can occur as well, Another common source of ulnar sided ( little finger) wrsit ain is the cartilage and ligaments on that side. Tendons can also be irritated from too much loading and the tendon can even tear a bit. tendon and ligament boney avulsion injuries near the wrist can be sore, See PCP or handdoc