I have been feeling nauseous on waking (no, am not pregnant!) and yesterday felt generally tired and rubbish, bad back, slept most of the day. This morning I felt even more sick, and I keep having horrible feelings as though I am having rushes of adrenalin, the kind of feeling you get before you vomit, or faint. I haven't fainted, or been sick, but I feel really peculiar. I have a sore lower back on one side- could it be a UTI? (I do have a bad back anyway) No other UTI symptoms, not hurting to wee or anything. I'm on thyroxine but the dose is tiny (25mg) and I have been on it for two months. Should I try and see a doc today? Feel really nauseous again- am going to lie down