fp, whenever i find another spot of skin cancer (mine are basal cell), i always have a freak out thinking this time it will be melanoma (especially since my uncle was diagnosed with it last year).
remind yourself that melanoma almost always shows up on parts of the body exposed to the sun - it is extremely rare for it to show up anywhere else.
keep repeating the above as often as necessary.
when is your appointment?
you are stronger than you think; if this turns out to be something serious, you will be able to handle it.
another member here has been going through this, her screen name escapes me at the moment, if you do a search you will be able to find it. i don't recall if she's been around lately, but her last update was very positive.
let us know how you're doing.