If you 'busted' a vessel in your head, you'd know it. That would be a major aneurysm, and it would hurt very very badly. The nervous system is very tricky and will mess with you in many ways, just like the subconscience. Your mind might also be playing tricks on you. The mind is a very powerful thing. Sleep on it. If it doesn't feel better in 2 days, go to the hospital.