Pain in left breast on upper left side towards armpit

Hey all, 

Over a month ago I noticed that my breast was really sore on the left side toward my armpit. I didn't think much of it first as I have lupus so I seem to always have aches and pains. But one day I was feeling it and I noticed that there seemed to be a lot more "tissue" in that area (if that makes sense?) than on the other side. It seems to only have gotten more sore the longer I've waited for answers. I've beent to the doctor a few times and to be quite honest I am just not impressed with Ireland's healthcare (ther is a bad rep for women's healthcare here). First doctor told me that he could not feel anything in my breast unusual at all, while poking around in the very painful area and clearly seeing me in pain. He said it was probably just an inflammation of chest wall, which seemed ridiculous to me as I can feel that it does not seem like it is in my chest wall. I told him I feel lumpiness but he wouldn't listen. 

Second (female) doctor told me that she could feel no cancerous lump but that it seems to be glandular - indicating she could feel something there but not a lump necessarily. She agrees with me that it is in my breast, however, so referred me to a breast clinic which she says could take 6-8 weeks to hear back from. 

I'm really worried as it is so sore and I can very clearly feel something there. Then I was reading about Inflammatory Breast Cancer and how it doesn't usually present with a lump and spreads rapidly and is virtually incurable and now I've seriously freaked myself out and feel that I get zero answers from doctors here. 

I was told even after the breast check they will most likely just prescribe me evening primrose oil and tell me to come back if it doesn't go away - this seems insane! What if it is cancerous? Surely that is too much waiting!

I have never had soreness in my breast before in my life. I am 29 years old and surely if it was hormonal or something I would have experienced something similar by now?

I'm really worried. Any advice would help greatly!