I've had a headache for almost 2 weeks now. It's over my forehead (makes my eyes feel very heavy), occasionally thumps on the top of my head and is generally like a pressure around my whole head. I gave up smoking 2 weeks ago and thought that it might be connected to that but now it's gone on so long I'm not sure. I'm very tired with it too. I've had a blood test for thyroid function done but had no results yet. Could it just be a stress / tension headache or should I panic?