The nurses at work are hosting a RedCross blood drive next week. I have a saturation biopsy (Doc said there would be a minimum of 18 cores taken) scheduled for the second week in Nov. Information I have gleaned off the internet says that blood donations should be at least 56 days apart. I bled pretty bad (at least that's what it seemed like to me) after my last biopsy and it was only 12 needles. I can only imagine how I will be bleeding after this next one and I worrried that it might be too soon after a blood donation.

Any thoughts or advice would be appreciated. Thanks and good health to all.

They may not want your blood if there is a chance you have cancer - that is one of the diseases which exclude you from blood donation in UK.

The U.S. also won't accept blood if there's a chance of cancer and in any event it shouldn't go into the blood supply. You shouldn't even consider it if you're scheduled for another biopsy.
Good Luck,
Bob