Possible lump in left nipple Male

Hi

I have noticed that I am experiencing slight pain in my left nipple. I already have an appointment for it to be imaged. I have noticed that when I put a shirt on or off and it brushes up against it there is slight pain. it hurts to the touch. I had a dr look at it and he thought he might have felt something. The area is not discolored or cracking, its just sore.

Back in 2011 there was a large pimple on my left testicle. It turned out to be nothing and was ruled out as a be nine cyst. My mother has had cancer taken out of one of her breast and now is having another scare where the doctors saw something. So her and I are going through this at the same time. Can any man tell me if you have had this problem and what it was. I have already looked through many websites that say its usually just a cyst and not cancer and it is rare in me.

Thanks