Gumby, I am so sorry you have that stupid c-diff!! It was the absolute worst thing I think I have been through yet and that is saying a lot considering all my issues. Hopefully it will resolve fast for you on the Vancomycin. Are you taking the probiotic Florastor? If not, consider adding 4 per day. I got that advice here on the forum and it saved my life. That is what helped me finally, after four months, resolve the c-diff. I had several rounds of Vancomycin but it kept returning until I started the Florastor . It is available at Walgreens.
Sorry about your nausea. I didn't have the nausea so I cant speak for that, sorry. I had a ton of other issues from Vanc including ear ringing that has never resolved to this day.
Be good to yourself and get plenty of rest and fluids. I ended up in the ER several times even after giving myself several IVs during my long bout with that devil c-diff.