Ew...What's this on my foot?!?!?

Okay so, put your foot out so you can see both big toes. On the left of my right toe there's this big brown pimple thing on it. It is soooo disgusting I dunno what it is. And on my right of my left toe you can feel one forming but it's not brown...yet. Let me describe the one on my right toe. It's kind of a light-ish brown and as you go into it it gets into a black dot. It's harder then the one on my left toe....WHAT THE HELL IS THIS?!?!? I have a wedding to go to and I can't go with a brown thing on my toe!! Please help?? I don't think it can be a tick. Because I have the same sort of thing on each of my big toes in the exact same spot. It's just my right toe is darker. Please help this is grossing me out!!! What is this?!?!?