Armpit lump

  Hello all,
came here to try to find out what I've got going on here.

27 yr old Male.

this past monday (12-10-2007) I woke up and had a sore armpit, I went to the bathroom mirror to see what was hurting me and easily found a lump, about the size of an eraser on a pencil, mildly tender to the touch.

the next day, tuesday, the lump was larger, not a lot larger but larger, but I could not see the lump itself in the mirror.

on wed., the lump got larger (almost double) and a slight rash in a ring around the lump appeared, armpit itches occasionally, but not badly (just irratating).

thursday brought no change.

today, friday, the rash did not spread but it got fatter and more pronounced, itches still and lump is tender to the touch, I can feel the dull pain (like that of a bruise) when my arm is down now.

I've read that it could be swollen gland, ingrown hair etc.....
I do not shave and I also have a long history of many kinds of cancer in my family, not to jump to conclusions but I am very worried about this as I havent been sick since i was in my early teens (even ear infections, flu, colds, etc.)

  I have a doctors appointment monday but im going crazy with worry.   any ideas?

hope i described it in a way thats understandable.

thanks in advance for your help.

  Import