Is having a headache thats so severe that it wakes you up from sleep, the same thing as rolling over and waking up and then realizing you have a headache? are those of the same concern? thanks?

A headache that is severe enough to wake you from sleep is concerning-a migraine is a likely diagnosis but if it is new, you should discuss this with your doctor. If it is severe enough to cause vomiting, you should go to an ER. This is not the same thing as waking up and then realizing you have a headache-in this case, the headache did not awaken you and therefore, it is not as severe. Good luck!