Do you think i should be concerned about my mole?

It depends: That depends on the caractheristic of the lesion. Suspicious lesions for a malignant mole are irregular borders, with different colors, growing quickly, asymmetry of the lesion and having itching or pain/tenderness on the lesion. You should see your primary care physician, so he can take a look at it and advise you if it needs to be removed or not.

Mole = Nevus: If you are concerned to ask you should probably have it checked by a professional. A dermatologist or a plastic surgeon are my recommendations. Changes in color, irregular borders, ulceration, and changes in size are all conditions that should be addressed. Best to you.