Hello,
Although chances of a melanoma are less from these symptoms but nothing can be said without a biopsy skin. Melanomas are usually >6 mm in size, with irregular borders, asymmetrical and dark in color. If the mole shows any of these characteristic features, then it needs to be evaluated.
I hope it helps. Take care and regards.
Can you please update on your daughters results as my niece has a very similar mole on the bottom of her foot. Sending my best wishes that results were negative!