breast clinic - referal

Hello,

My GP refered me just over two weeks ago to the breast clinic about a small hard lump in my left breast. The appointment is tomorrow and I'm very nervous. The GP said that it was probably nothing, but I also have had a dull ache in the same breast for months (back in November a GP told me that it was probably muscular and nothing to worry about). I can't help thinking now that it is possibly more sinister.

Posting here in case this rang a bell with anybody...