Is there a way to stop the swelling in HA sites so I can go back on vancomycin? (Photo)

Recently diagnosed with C Diff & they prescribed vancomycin. Within 6hrs of 1st pill I started to swell in my face in locations I previously had filller but not in all places, 1 side of my cheek under 1 eye more but the most important is the spot on the left side of my chin where I had the latest one. I did not have any obstruction of my airways or swelling elsewhere on my body. If the Flagyl I’m on now doesn’t work is there a way to stop this so I can go back on vancomycin? F/36!