Nancy DPT
Just my reaction - I (ME) would keep the earlier appointment. Waiting is not something I do well.
(I believe) this is your first biopsy. A second biopsy shortly after the first is common. The first explores the question of cancer, the second, if cancer is found, often determines the extent of the cancer. My first two were 3 1/2 weeks apart.
Blue light, like every other procedure, has limitations. For me, blue light provided no useful information.
You have allowed yourself two choices. There is no precise answer to which is best. Which choice will let you sleep at night ?
If you plan to go home with a leg bag, ask (in advance) about a night bag and tubing to reach to the edge of the bed. Hopefully an option available to you. Much more comfortable and less bothersome.
Best
Jack