If your mole has changed in size or color you should absolutely have the mole examined by a board certified dermatologist with experience in skin cancer. It is better to be on the safe side especially if you see that the mole had changed.
There are at-home options for mole removal, but plastic surgeons usually recommend that you opt for proven methods of surgical or nonsurgical mole removal such as excision, punch removal, hyfrecation, and laser. Best, Dr. Karamanoukian Los Angeles
The darkness in this area appears to be melasma. Melissa is from a combination of sun exposure and often hormones as well. Please consult a board certified dermatologist to discuss options from bleaching creams to Cosmelan.