My right chest muscle is MUCH bigger than my left now.?

I work out 3 times a week, full body workouts. Lately I have been noticing that my right chest muscle is becoming quite noticeably bigger than my left! My normal chest exercises are Chest Fly with dumbbells, Bench press with dumbbells, and push ups. 10 reps for both the flies and the press (on the ground cause I don't have a bench yet), and 20 reps for pushups, 3 set for each. During these exercises I don't feel much of a burn in my left pec, but I do in my right. What should I do to balance them out? Any suggestions would be really appreciated.