Red bumps on both breast, I don't think they are pimples.

So I have rather large breast and I have for a long time, I was a DD the beginning of high school and of course at that age I had a few pimples here an there and I pop them and move on, some are a little stubborn of course. I have also always had really sensitive breast, like I had a flip flop thrown at me and it hit one of my breast and cried, kind of like a man getting hit between the legs kind of pain. I've asked doctors and they don't know why it's like that. Now I'm 25 with 40DDD, I still get pimples here and there and they usually go away after popping them, still overly sensitive, but a few months ago I got what I thought was a pimple on my left breast, it was painful and I eventually popped it, but it came back and it was like a repeat for about a week and then I popped it one night and it was green pus with a little blood and it smelled bad. I put antibiotic ointment and a band aid on it hoping it would heal and go away, then another popped up on my right underneath my areola and did the same thing except the first two are now flat and kind of scarred and produce slightly harder pus. Three new spots have appeared on the left that are more sore and don't really produce pus, the largest seems to have a pool of blood underneath it, and another two on my right breast opposite of the first one. The first initial two spots are 2+months old, the other three on my left have been there for about 6 weeks and the newest two have appeared around last week. I've taken antibiotics that I still had left over, used antibiotic ointment hoping that would work. Nothing yet. I also have a dimple above my right nipple that appears when I lay down while the other breast remains, well I guess round or as round as it would be while laying down. I've not gone to a doctor or dermatologist because I don't have the insurance for it and want to pretty sure before I actually go. I am a very clean person and shower daily with the same products.

A little family history:

Cancer is a major problem in my family, my mother is dealing with rectal cancer that has created spots on her lungs and is currently going through treatment. My grandmother had spots on her liver I believe, my uncle had it in his lymph nodes and eventually spread to his brain. 

I'm only seeking opinions or others who have had this issue that got sure results after seeing a doctor.

Thank you in advance.