Is A Peeled Mole On Skin Post Exposure To Sun A Cause For Concern?

Hi there, i recently went on vacation in peuto rico and was snorkling , applied sunscreen of couse but got pretty sun burned anyways ... As my skin peeled a mole that was not too big but darker beown peeled off,probably due to scratching and trauma of the sun burn. Its been about 2 weeks and i see the mole looks like its starting to rejuvenate but its a lot lighter in color . Went for skin check and asked dr about it . She advised me to wait a couple of weeks more as a sun burn will sometimes show up looking like a melanoma or false reading , do you know this to be true? and seeing that it was documented as being a quote normal mole about 18 months ago, would you think this is good advice or should mole be biopsied now as opposed to waiting a couple of weeks? Im kinda worried about it .fthank you