What is causing a tight pain in the middle of my pecks? my mom believes it's because of my chest workouts, but sometimes it hurts on an off week.

Could be exercise: Too much strain and not enough time to grow new tissue can result in a chronic pulled muscle insertion along the sternal border. This can lead to inflammation and pain. Try to give these musles a 7-10 day complete rest and use nsaids for pain. If pain continues see your dr.

Chest pain: Your mom is probably right. Lay off the chest workouts and see if you improve.