Hello, I'm only 15 years old and I believe I'm pretty health, I hope. Lately, I've been getting pains on my ride side, right under my rib. Today my left side didn't feel 100% either but it hurt more in the front if I laughed or coughed. My right side hurts mainly when I throw a ball or run. I have no idea what's wrong but it's scaring me. I have a doctor's appointment tuesday but I'm scared it's serious and something could happen in these 4 days. HELP ME PLEASEEE