wow i remember those days.
when i read the title on the board, i right away asked mysel, 'i bet this is a young girl'.
when i read your message, i saw you are 15.
when you are young its normal to get that. it is basically the beginning of your period...even if its not yet due, this can happen 1 week before your period, it goes away, then you bleed. it is blood, and it doesnt smell too good either because its old blood. i remember this.
I still even get this sometimes...but im in my twenties.
its the green and yellow fishy smelling discharge you have to be concerned about.
but if you are still unsure, by all means see your doc