Biopsy

I have had a lump on my back for 2 years when I first noticed it GB said it was a subacuous cyst and not to worry went again and said the same thing went for the 3rd time abs was referred to dermatology who said without seeing me it was cosmetic and I didn't quality for removal, I was at the Dr a few weeks ago for something else and mentioned it to a different GP in my practice who referred me to get pictures and now I'm waiting on biopsy results wondering if it's skin cancer I'm petrified