I have had a persistant painful headache across my forehead for the past 8 days, along with nausea, diarrhea, fatigue and lightheadedness, i have been told by a doctor i have sinusitis and have been commenced on amoxicillin, however i dont have a runny nose or headache type pain in my face or anything like that so i am doubtful if this is what i actually have. I have taken the antibiotics for 4 days now. along with paracetemol which didnt work, ibrufen which hadnt worked, and now cocodamol, and none are even slightly calming down my symptoms, what can i do? Im getting really distressed about it as ive had it for so long and its not easing off at all its becoming unbearable. The diarrhea isnt a problem now its more so the headache, nausea and lightheadedness which are persistant and are not easing off at all no matter what i take, and its that bad that some days i cant even lift my head off the pillow. Please give me any useful advice. Thanks