Hello,
From the symptoms it can be a compound mole or a atypical mole. Both are benign conditions. If you notice changes in the mole's/mark’s color, height, size or shape, you should have a dermatologist evaluate it. You also should have it checked if it bleeds, oozes, itches, appear scaly, or become tender or painful. Otherwise it should be left as such.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Moles should always be "suspect" if they change.
It does sound more like a "pigmented nevus", but only a biopsy will determine if the cells have become active.
If it's cause for concern a biopsy will set your mind at ease.