I have a big red mark on the dark side of my boob (on the underside, the bit I can't see) which I found yesterday. I mentioned it to DH and he said, oh yeah..."I noticed that the other day" - but he can't remember which other day but some time this week 
It's bright red, about the size of a lime in dimensions but it's not raised in any way. I haven't had an injury, besides it doesn't look at all like a bruise.
I suppose ignoring this isn't a good idea. What do you think I can expect when I go to the doctor's. Will I have to stand there like a bloody lemon with both my boobs hanging out? Will they automatically refer me to a breast clinic? If they decide it might be non cancerous, will I be sent away to keep an eye on it? Are there any questions I should be asking when I go there that I'm too dim to compose in my minor panic?