Hard blister on big toe?

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I had a blister on the side of my big toe, thought I'm not sure it was a blister. It looked like one, a clear bubble, but I tried pressing it and it was not soft. I know I wasn't supposed to do it, but I cut it open, though there was no liquid and it just seemed like I cut a callus. Now a (really) thick scab forms above it, and it protrudes out of the side of my toe. It hurts when I press it. It's been almost 2 weeks already and it's still not healing. Can anyone tell me what it is?