urinary tract infection
"Relieved UTI symptoms fast but  after day 2 of taking pills two times a day I woke up in the middle of the night with a killer headache! Painkillers did not help one bit to relieve the migraine. Symptoms currently are migraine, nauseous, vomiting, neck and back stiffness, fever with chills, muscle aches, diarrhea and it hurts so bad to even move my eyes. I just may be allergic or "sensitive" to this antibiotic but even though my doctor said to keep taking it I don't know if it is worth it, especially if it will continue symptoms mentioned."