Inter coastal pains won't go away (over a month)

Hello everyone, To give you a bit of background on the situation, I had a cold at the start of Feb and because I was coughing a lot I had on the 14th of Feb a very strong to pain the ribs that started. I went to an NHS walk-in centre but they reassured me that nothing was serious and that it was just due to the cough, that I needed to rest etc. The only problem is that we are now the 17th of March and I absolutely saw no improvement. At the time they gave me strong pain killers that naturally reduced the pain but as soon as I would move too much it would come back. I spent an entire month without doing any sport but then seeing that it wouldn't go away (maybe stupidly) I went back to sport (boxing). With no surprise every time I do a sporty activity this hurt even more. To resume, this pain covers all my chest and hurt when taking too deep breathes, moving in a certain way, coughing/sneezing. I know that it is something quite usual but i feel like it's been too long now! I'm 24 and pretty healthy. Your thoughts are very much appreciated, Many thanks, Juliette

You could have costochondritis. Google it and see if it sounds like what you have.