Thank you! Do you think chest xray could help?
could you have done something to work that muscle out? Once I had one sided breast pain and was worried about my heart. I figured it out . . . I was playing with our dog, tug of war with one arm and it affected that muscle. Crazy. Anyway, it could be something like that. If it continues, then it is best to see your ob/gyn to be examined. good luck