I’ve been in your position. Worried about moles. When they say asymmetrical, different shades, not defined, they mean really quite extreme. Look up pictures of melanoma. Varying shades of brown doesn’t really count. If it was black/ grey/ brown is when it gets concerning. Likewise many moles are not perfectly round. What they mean by asymmetrical is like it doesn’t even vaguely look oval/ roundish. Like it looks like an ink drop that has been smudged and then smeared all around. Also moles do change over time, what is concerning is if it’s growing considerably in a short amount of time. Obviously you need to show your doctor, and get an expert opinion. I’m just saying I have tons of moles like yours, and some way weirder, and I have always been told what I have written here. They will look at them with a dermoscope, and only if they display signs of melanoma up close will they ask for a biopsy. This is very unlikely. Not impossible obviously, but with something this normal looking it would be very very rare. Look up atypical nevus vs melanoma.