Hello and welcome to the forum. The most important thing to do is get this seen by a dermatologist. They will guide you. Has this been a change in your mole? Here are the 5 factors to consider in a changing mole:
Asymmetry: are the two halves of the mole different? Less symmetrical shapes are generally more concern.
Border: are the edges of the mole are poorly defined? Is it ragged, irregular, or blurred? Again, regular shapes are less concerning.
Color: is the color uneven with shades of tan, brown or black? Some melanoma is blue or pink.
Diameter: has there been a change, particularly an increase, in lesion size? Increasing size, especially over 6mm diameter is more concerning.
Elevation/evolution: as melanoma progresses, it may grow down and up from the skin, becoming elevated. Early melanoma may be flat and any change is a concern. This change may be in size and shape or in symptoms such as itching, bleeding or scabbing.
Here's a good link to help you as well https://www.mayoclinic.org/diseases-conditions/skin-cancer/symptoms-causes/syc-20377605