Welcome to Cancer Chat and I hope you won't have to wait too long for the biopsy results and that the procedure wasn't too painful. You mentioned that you find that the lump is now harder and slightly more prominent - it might be worth mentioning this to your doctor and asking whether it is to be expected after a biopsy. Feel free also to give our cancer nurses a call if you have any questions on this free number 0808 800 4040 - their line is open Monday to Friday from 9am to 5pm.
Keeping everything crossed for you for good results!
