I'm confused. What is Q? And are you on a medication? Did you just start taking it, or did you just stop taking it?
I'd check with the prescribing doctor if you have a headache from medication, to see if there is a normal period of adjustment expected. If it's very bad, I would ask for a different medication for whatever condition you have.
Some people get headaches from unexpected exertion. If you have just started a very intense exercise program, maybe dial back the intensity for a few days until the headaches aren't a problem.
Drink enough water! Dehydration can also cause headaches.
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