Sharp abdominal pain on right hand lower side of stomach. Hurts to take deep breaths. Has lasted for about an hour. It just came suddenly.
See a doctor. Hard to say without examining you. Could be benign like simple musculoskeletal injury. But your description of pain on taking deep breaths is concerning... See a doctor so you can get examined (to make sure it's not appendicitis, perforated gastric ulcer, testicular problems or a whole host of things).
Appendicitis. The most concerning diagnosis would be appendicitis. Please see a health provider if the pain persists or worsens.