Side Effects of Implant?

Has anoyone had a similiar situation? I had a mastectomy on March 26th. I had a saline pouch inserted, but not inflated. Since then, I have a "marble-like" lump right near the area the pouch was insterted. This lump is very sensitive to the touch. They do not know what it is and it will be a week before they go in to look at it. Also, since the mastectomy, my other breast has been leaking a clear fluid. No one seems to know what that could be either. If anyone has experienced anything like this, I would like to hear about it. Thank you.