I also had C-diff. I thought it was the stomach flu back in February. I went on Flagly and didn't feel better until one day after taking it. I have been taking Florastor and VSL #3 on dr. orders. He told me to take the florastor for at least 3 months. I am in another flare, but the symptoms are different so I don't think it is c-diff again , but Dr. ordering flexible sigmoidoscopy next week to be sure.
Luckily I only had to do one dose of antibiotics. Hope you feel better soon.