Thought I was getting cystitis yesterday so popped to the chemist for sachets. Feeling worse this morning, so managed a phone consultation with doc this afternoon as started feeling yuk, with stomach and back pain. He said it was classic symptoms, said he would give me a prescription for AB's. I'm drinking plenty water, and peeing more now, but feel sick and hot and cold. I have now taken two of the AB's and am getting palpitations. Cue, health anxiety ! Can anyone tell me, if this is due to the tablets or the infection itself? And also, can I take paracetamol along with nitrofurantoin? I feel awful, and we're due to head away for New Year tomorrow. I'm so worried that my condition will worsen when away, and I'm now panicking about kidney failure, and all sorts.