Yes, I've had to take some strong antibiotics and then got sever diareah... Ended up having C Diff which was aweful! I ended up in the hospital twice in two weeks with low potasium and dehydration. Please go to your Dr. so that he/ she can test your stool!
I am scheduled to have ureteral stent removal with shock wave lithotripsy in one week. I felt I had a UTI so doctor prescribed Ciprofloxacin. After taking the antibiotic for a week I have now developed severe abdominal pain & cramping. I took my first ever Oxycodone 2 nights ago and then last night so I could sleep. However, I'm going to stop the Cipro since I believe that is causing havoc. I also have not had a bowel movement in 3 days.
Was the yogurt enriched with probiotics? Antibiotics help us but also kill off the good bacteria in our intestinal tract. It sounds also like you need a stool softener, fiber and lots of water. If these things don't help, I would see a Gastroeneterologist for an evaluation. Take care...