acral lentiginous melanoma?

Hi, i had this mole (https://zupimages.net/up/19/38/v368.jpg) 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)