Sounds like an episode of my type of mania to me. Are you also having racing thoughts? I don't get headaches exactly, but I get pressure in my forehead right in the middle of my eyebrows, like someone is pushing me with their finger... and my head feels like it's filling with water.

I don't have euphoric mania, but dysphoric mania and tend to mix very easily. Perhaps it's a good time to call your doctor?