Hi Elise!
I just finished 8 rounds of Xeloda (dropped the Oxy after 2nd round due to pulmonary emboli) and can totally relate to what you're saying!
Exhaustion - check (I was getting around 10 - 12 hours sleep per night and didn't allow myself to nap)
Energy Level at Zero - check (it sometimes took me 3 tries to get the entire dishwasher emptied cuz I had to take a rest or two --- exercise just made me feel worse)
Nightmares - check (woke me up frequently and then took a while to get back to sleep)
Nausea - check (kept pretty much under control with ondansetron and prochlorazine taken on schedule)
Diarrhea - check (6 to 10 times per day, with no apparent relation to diet, except salads added a whole new definition for "salad shooter"
)
Abdominal pain - check (again, no relation to diet, no apparent cause, finally got it under control with percocets starting at round 6)
Hand / Foot Syndrome - actually, I seemed to mostly miss this one (Yay!), but I moisturized continuously and exfoliated my feet almost daily (I was on 50mg per day of vitamin B6 with the permission of my onc)
Brain Fog - check (it took a lot for me to follow conversations, and I didn't even try to get into books or tv shows that would force me to think - it wasn't going to happen!)
I'm almost 4 weeks out from my last dose, and almost everything either has cleared up or is at least getting better. My onc figured that I'm just one of those on the "nasty" end of the bell curve for reacting to chemo (I even managed to get more pulmonary emboli while taking low-molecular-weight heparin shots during the chemo, and had diverticulitis at the end requiring a couple of weeks of antibiotics).
Talk to your onc about it and have him make sure that there isn't another cause (pulmonary emboli can make you pretty darned tired, too), and get their recommendations for what you can do to deal with the side-effects. If you do happen to be like me on that "nasty" end, then please take heart that it DOES get better as soon as you're done, and it improves actually pretty quickly.
Hope you find some ways to feel better!
Best,
Laurie