What Relieves The Pain In The Chest And Injury Not Healing?

I got hit on the right side of my chest three four weeks ago when i was training MMA at the gym.. it was a back kick from my coach when i was sparing with him.. but the problem is that the pain isn't healing and the injury isn't covering.. i feel pain when i breath and when i try to sleep on my face in bed..and sometimes when there's no pain or it's very low when i touch a specific place on my chest i feel pain... (there is no broken ribs and the place i got hit on didn't make any marks "blue - yellow etc..") any help please how to heal very quickly... oh yeah.. after several days from the hit i started to feel better, but when i was making sports exercises i felt the same pain again like i just got hit... and yesterday i fell on my back when i was training and that was it.. i couldn't move or speak or do anything and now i'm in pain 24/7