Thank you so much for your support! I've decided to keep the appointment with the dermatologist - I agree, trust them more than regular doctors.. Now I'm just trying to stay as calm as possible until Wednesday. Sharing here and being acknowledged has helped a great deal!

Hoping it's 'just' a skin infection.. My scalp is badly affected by seborrheic dermatitis behind that ear, so I'm hoping the spot is part of the same problem, though it doesn't actually look entirely similar.. But, we'll see!

Thanks again!