hi, for the past while now i've been getting this weird sensation in my ribs.It happens mostly if I cough or laugh really hard but sometimes it appears triggered by nothing. I used to workin a bar and did a lot of lifting and stuff. Its really weird, it feels as though they ribs are going in and out of place, its uncomfortable more than painful but can hurt. sometimes it feels like a clicking feeling. Some times also wen i feel my rib cage the righthand side(my right)seems to be flater than the left(THE LEFT APPEARING MORE NORMAL and curved), and it is the right side that gets the discomfort. I did go to the doctor and was told its just from the muscles contracting or whatever but i dont think this at all and am quite worried. im only 21 f and it is making work etc quite hard to do.