Kim's right-breastfeeding at its best. Now were you still pumping and dumping throughout taking your medication? If you weren't you likely have clogged ducts...that could potentially be the bumps, you might just have a few close to the surface of your skin. However if these don't go away in a couple of days I would get into your OB/GYN. The soreness to your breast itself, not the nipple, is usually linked with clogged ducts and you usually know if you have clogged ducts - there will be lump(s) in one or both of your breastsand they'll be very sore. Best way to combat these is to take warm showers, pump often (every 3 to 4 hours), apply warm wet washcloths or what always worked for me was massaging my breasts while I was pumping and breastfeeding, just do circles around & over the lumps and that works them out. You can massage them too while your in the shower. If you develop redness on your skin near the lump however get your butt into your doc - the clogged duct likely has turned into mastitis (an infection in your breast necessitating antibiotics). As for the nipple - keep yourself dry, change nursing pads right away when you're leaking and LOTS & lots of Lansinoh or Lanolin (nipple cream). Cake it on, especially before you go outdoors. Carry that stuff with you everywhere. But be sure to wipe excess off just before nursing. It's okay for a layer to be on there, but no one wants a mouthful of goo. I hope this helps.