Breast Pain left breast

Hi I've been googling for weeks and so glad a post came up on here as all the others sites always seem to end up with breast cancer!!   Just after Xmas I made an appointment with gp, thought I was seeing gp as I've had breast pain and  under arm pain,but when I got there it seemed to be a student doctor to be fair I thought she did give a good examination she said she couldn't feel anything  and after she spoke to a doctor was giving naproxen for a month.  As she thought a strain.  Tablets didn't work maybe took a bit pain away under the arm but definitely not in my boob. Was at doctors for another reason and mentioned my boob, she examined me again but this time said I can feel something I'm referring you, appointment is this Friday but worried sick now she said this , I've prodded and poked it I can't feel anything different to before Xmas.  Pain can be intense down left side and down to nipple , one day and the next there but not as intense.