Homemade chocolate problem!
The chocolate has "seized". This is what happens when you add water into the melted chocolate.


  I was pretty confident I got no water in.


No, you added honey and vanilla extract. Both contain water.

The standard solution to seized chocolate is to stir in boiling water, a bit at a time, until the mixture is smooth. The result is not useful for confectionery, but can be used to make hot chocolate or chocolate sauce.