Hip pain under right hip bone, groin, and sometimes lower glute. Snapping if moved sometimes but not painful snapping. Young athlete and rower?

Let me explain. Rowing injuries are primarily overuse related. The knee, lumbar spine, and ribs are most commonly affected. The injury incidence is directly related to the volume of training and technique. Hip injuries also related to either overuse or wrong technique. It sound to me you developed some inflammation in that (groin).