Try not to worry too much. Most changes in breast tissue aren't cancerous (click on the link). If you have a regular GP that you trust, it might be worth making an appt with them for Mon or Tues rather than waiting for ages at the hospital which can be stressful in itself, and they may not even be as helpful (your GP will be able to follow up on results etc better than a random hospy dr). If you don't have a regular GP, now is a good time to get find one that you really 'gel' with. I know better than anyone how hard it is to wait when you're worried, but get some support, and do lots of nice things this weekend to distract yourself.