I have been taking Amoxicillin 250mg since Thursday lunch (although I did miss a dose on Friday) for a chest infection. I am still coughing up green gunk and my cough is no better. I am still really tired and get breathless when I exert my self e.g. going up stairs. I have woken up the last 3 mornings with a headache, which goes away if I take cold capsules (paracetamol and phenylephrine). Should I wait until I have finished the 7 day course before I see my GP again, if I don't feel any better, or should I try and see him sooner?