Not sure if this is a tad late or not... But I'd be concerned for consistent right sided stomach tenderness or rebound. If it started recently, you could potentially have appendicitis or a burst appendix. You could also have some bowel issues affecting the right side or some sort of gallbladder issues like cholecystitis (however pain can be felt in the right shoulder at the same time).
In other words, I recommend going to the emergency room... Appendicitis is a very serious and potentially dangerous concern.
Clean the trash cans with hot water and detergent and spray the inside with sanitizer. Do this at the end of the day every day and leave to dry overnight.
falling, similar, there all potentially bad but (i think this is an option question) i think gymnastics could be more dangerous bacuse of the flipping.
