acral lentiginous melanoma?

Hi,

i had this mole (19/38/v368.jpg - Visionneuse Zupimages) 3 years ago on the hand. After i have read some articles about diseases yesterday i can now say that i’m really worried.

I picture the worst…

Size is 0,3mm. Should i be worried? I don’t have any appointment until next month (i’m 32 years old man, with dark skin)