It does sound like
C-
Diff. you should go back to your doctor, the earlier you treat
C-
Diff. the better, I also had MRSA, if you eat yogurt, it will also help you balance out the bactiera in your stomach. Also before you switch to a different antibiotic you should have them reculture your MRSA to see what it is sucesseptable to. There are other meds. like IV clindomiacine, or vancomaycine. I hope your not just taking an oral medication, you should have an ontiment, a specail soap.