I agree that you should discuss your concerns with your physician. You are on quite a large amount of meds right now, each with their own side effects, which could very well be the culprit of your fatigue and other symptoms. Most importantly, you are still having significant epsiodes of diarrhea. That needs to be managed better, in my opinion.
C-diff (as you well know now) can be VERY devastating....but it is also treatable. Sometimes this involves a specialist outside your area. I've actually watched many a patient just be at their wit's end after battling chronic c-diff for so long, and then saw them after time....and they were able to make a complete recovery.
Anyway, my point is...you definitely need to discuss all of this with your physician. Your diarrhea absoloutely needs attention...
Also, just know that those with chronic c-diff infections take a while to get through it. Please keep communicating with your MDs and keep the faith.
Best of luck to you....
Have you talked to your doctor about your concerns? Another good resource in my opinion, is your local pharmacist. Regardless, if you feel you are suffering from these symptoms, go see your primary care physician with this; that is what he/she is there for and can help you on your way...keep us posted.