Dakota going to the doctor

So the other night i'm petting koda....and i feel something on his neck. so i sort through all the fur and see a black spot. It looked like it might be a tick to me. I went and got my neighbor, Chris, who said she has experience pulling them out etc. Ok..good. I really didn't think I could do it. At All! So she tried a few things to get it to come out on it's own and nothing worked. Then she got the tweezers *cringe*. She tried and tried to pull it out and the only thing that happened was it started bleeding badly. Ok...it's a tick...she squeezed it and it's bleeding. and it looked much smaller after. good yes? not so much. It turns out this is not a tick afterall, it's a growth. a black one. I cried and cried and cried. My poor baby. He's going to the vet on saturday so we'll see what they say. I feel like a horrible mommy for having put him through that and it wasn't a tick at all. Granted, he was a trooper, layed there and trusted us completely and it didn't seem like it bothered him much so at least I know it's not hurting him. But wtf is it? :(