sorry man I apologize for coming off like that and after seeing your screen name, as a fellow NY'er and giants fan lemme help out as well, as long as you ain't a mets fan, jk.
Run either Serm and also make sure to get an AI, prami and aromasin, run the prami ed at 0.5 and depending on a few things you may need to boost it and use the aromasin at 12.5 eod. This will help out a lot too and worse comes to worse, you might have to hit up letro, but hopefully it's not serious yet. A couple OTC test boosters would just help a bit, fadogia will help your bad boys get pumpin again and if you have anymore questions please feel free to PM/post it here and I got you.
Is your nipple scratchy, sensitive, constantly swollen? When you say a lump, does it feel like a marble behind it? Any way you could take a pic and so we could see if anything is developing.
Next time no matter what you run in the future: inj/oral/trandermal anything, please have a serm + ai on hand just in case things like this happen.
I want to apologize again, because I am a real stickler when it comes down to having supps/pct ready and I don't know who gave you advice or when you read it, but next time please do a bit more before you start anything.