Hi Miss Goddess, i am replying so that it comes up again as a New Post and hope that someone can answer you..
I live in Australia and unfortunatley i can get and have got a mammogram under Medicare it's a Government insurance we all have, so i can't answer the cost factor.
I do get sharp pains though sometimes myself, and i have had my breast checked, pulps or something they called it, and there was nothing i could do about it, it comes and goes, fortunately not very often at all, in fact last time ws 18 months ago.
I check my breasts now ongoing and just look for "larger lump" to the last time i felt it and keep feeling it until it passes, by lifting my arm up and even measure it if need be with a ruler, so that i can see it is the same...
I also support Pink Ribbon through my business, 10% of my money goes to that charity every month.
I hope that at least helps a little and that someone can answer based on where you live, the approx costs of a check up.
Take care
CW