Hi Jwrenn,
I had a lumpectomy close to 5 years ago. The one thing I wish I had been told is that its normal to have all sorts of lumps and bumps around the surgery site when it heals, and its normal to get random pains for a few years after as the nerves heal (nothing dramatic, don't worry).
Do your exercises so you don't get stiff, and follow your doctors instructions and you'll be fine. Oh … and I had a blue boob for a while after the surgery due to the dye! :smile: