Advise please

Hi, I kicked in the right breat 3 months ago, and now have a lump and aching near the arm pit, I have a mammogram shortly just a bit worried it may be symptoms, can anyone advise the doc said it’s probably not, it’s deep tissue and will probably go harder but it’s now sore to touch where these symptoms weren’t there originally and now are, sorry to waste anyone’s time..x

thankyou..x