Brown spot appeared after CO2 laser mole removal (Photo)

recently i got mole on my face removed with a co2 laser right after the treatment the area was red and i applied vaseline on it for a week it formed a scab and fall of after 6 days. By then redness went away by days it then become pink colored and now after 2 weeks it turned into brown spot and it did not take the normal skin color. im very worried what to do now to make the spot as skin color again. i lost faith on my doctor and i dont want the situation on my face get more worse Please advice

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