More information is needed to answer your question-
Are you using a salve with zinc chloride?
What percentage of zinc chloride?
Did it itch and burn when you initially applied it?
Did it fester into a sore? If so,
Have you been cleaning the edges twice a day with hydrogen peroxide, coating it with vasoline and keeping it covered?
For the record:
If I had it to do over, and I had a mole, and I thought it might be malignant, I would go see a dermatologist. If it was malignant, I would let the dermatologist take it off, and immediately start taking bloodroot internally. In my opinion, this is the best way to minimize scarring and insure maximum chance of survival.
The mole by my knee took 3 months to crack and another month for the eschar to come out. The wart on my neck took two months to heal. Two weeks after the eschar came out of my neck, itchy little warts starting breaking out around the scar. I didn't want to give up, so I treated the area again. This time I was breaking out with more warts before the sore was even healed. Taking it internally was the only thing that stopped the warts from spreading on my neck.