Vanilla yogurt symptoms and conditions

65 year-old female. Severe headache subsided after first day on macrobid; loss of appetite but despite 300-800 daily calories for 10 days, no weight loss (Still 168.5 lbs.); razor blade feeling in vagina is the worst symptom; weak legs; shortness of breath.
Urologist's PA put me on macrobid for 14 days when she saw cloudy urine. Following week uriinalysis revealed no infection. Dr. cancelled macrobid on day 13. That was a full week ago. Razor blades and shortness of breath persist. Years ago a GYN recommended inserting plain vanilla yogurt for razor blade feeling with yeast infection anti-biotics. It has given some relief, if you don't mind tiny bugs and little dogs following you around!
Only now did I research urine infection test strips to learn I could have bought them myself and learned whether I had an infection immediately. I'm allergie to every anti-biotic.(Can't breathe.) I've had good results with macrobid prescribed for a few days in the past. I never want to take it again.