ive have this lump just ouside my labia for a couple of months now. it wont go away. i got it a day after my last brazilian wax. it is about the size of a nickel and it hurts when i push on it. when i first had it i could push of it and some white stuff and blood would come out but it doesnt anymore. is it a cyst? how can i get it to go away? should i be concerned? what might it be from?