2mm dark brown mole on heel that hasn't grown looked a little irregular and dr removed it. would it have grown if it was melanoma?

Mole: You need the results of your biopsy. Was the mole dysplastic meaning that the mole was pre-cancerous. If so, was the mole totally removed so it would not turn into a melanoma. If the biopsy showed a melanoma, you would need wide surgical excision by a surgical oncologist.

Depends: Melanomas can grow and change at varying speeds. Some melanomas change colors and shapes very quickly while other remain the same for an extended period of time. A skin biopsy is the way to diagnose a melanoma.