Jigga you really should be off the letro for at least a month before you start another cycle. You have non existent estrogen levels at the moment so you can't accurately guage how the gland will react to normal estrogen levels when off everything and if puffiness will come back. The gland has a VERY high aromatase concentration and unless it is really tiny, it won't take much to get puffy nipples again.
I'm not just guessing here. I have years of experience with battling gyno lumps bro and have seen a very good doc.
I had the same great results as you from letro (legit letro), tapered down, used a serm, but the lump got bigger again when I had my normal hormones back in full swing. So don't just jump back on cycle unless you know for sure and start adex/aromasin from day 1 when you are back on.