Hi,
I'm sorry to hear about you lingering problems. I have had C-diff 9 times. I was in the hospital 16 days a couple years back with C-Diff with Megacolon. Have had multiple re-occurences since. Had 3 FMT via pill form which helped for a short time and Cdiff came back. Was also on Dificid each episode which was a great help-but it always came back. On January 30th, 2023 had an FMT via Colonoscopy route. So far so good. BM's are not as they were when I was "normal", pre Cdiff. But as my Dr said, with having been through all your body has endured who's to say what your "new normal" is.
To address your question. I currently have Bronchitis and am on Antibiotic. My infectious Disease Dr placed me on Vancomycin 125mg- 2 daily- for the duration of the ABX, Plus 7 more days after finishing Abx. This was done as a prophalaxis to ward-off any more Cdiff developing. I HAVE noticed since starting the Vancomycin I too am having frequent, soft Stools (not diarrhea). You described it perfectly. I havent called my Dr about it-but I just assumed it was from the Vancomycin, as it seemed to start within a day of starting the Vanco. I hope that it in some way reassuring to you. I wish you the best with your healing process!