When i jump or lay on my breasts my right breast burns and hurts very badly like it's on fire inside.

See a doctor: There are lots of reasons for breast pain including infection, engorgement with milk, and cancer. Although cancer would be very rare at your age. I see you have tagged itching and rash as associated symptoms, which could mean there is an infection going on.

Fibrocystic changes: You could have fibrocystic changes. This is the most common cause of breast pain. It can be aggravated by caffeine, stress, menstrual cycle and hormonal supplements. If you are over 40, then you should have a mammogram and ultrasound. Please get evaluated by a breast specialist.