Should i be concerned that i have a lump in my right breast?

Only if it's cancer!: Unless you can be sure that lump is not a cancer, you should have your doctor check it out. It could be a cyst, benign fibrous lump, or just a "nothing." but, it could also be an early cancer. Wouldn't you want to find out for sure? And don't let a doctor tell you it's ok without having more proof if indeed this is something different from the rest of your breast tissue. "thinking" is not proving!