Hi, I understand your concern. Fracture rib would cause constant pain while breathing. You don t seem to have it. So the pain can be due to simple muscle pull, sprain or at the most a hairline fracture of rib.( which suggests calcium / vitamin deficiency-- a more possibility .. in a lady with having 3 children to manage at a time. ) You should try with rest, fomentation of the part. avoid massage,but light application of muscle relaxant ointment will do. take pain killer like combiflam after food twice a day. You should start getting relief in 12-24 hours. If no relief consult your family doctor. Get investigated as per need & start specific treatment. Thanks.