All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
It is not permissible to be pessimistic due to removing the mole as this is a kind of Shirk [associating partners to Allaah]. What Allaah did not legislate to be a means (of achieving a given objective), it is not permissible to take it as a means; for more benefit, please refer to Fataawa 91008 and 91474.
Indeed, the death of your father has nothing to do with the issue of removing the mole; each person will die according to his appointed time. For more benefit, please refer to Fatwa 83292.
Therefore, if you are in need of removing the mole, then you may do so with courage while relying on Allaah and having full trust in Him, acting on the Saying of Allaah (which means): {Say, “Never will we be struck except by what Allaah has decreed for us; He is our protector.” And upon Allaah let the believers rely.}[Quran 9:51]
Moreover, you should know that the whispers which you might have are from the devil, so you should not take them into consideration and you should seek refuge in Allaah from them.
The best thing by which a Muslim may protect himself from falling prey to such superstitions is by seeking religious knowledge taken from the Book of Allaah and the Sunnah of the Prophet .
Allaah Knows best.