Breast Cancer

I have found a 6x7cm lump under my left armpit ...I've been sent an appointment to the breast clinic for Friday. I've had tiny lumps before but not like this one that feels significantly larger and not as hard. I've also got a little bloody discharge from my right breast. I'm more worried that I have been previously. I've three children 27,24 and 17 and two grandchildren and I'm 8 weeks from being 50! Any advice would be welcome...thanks in advance x