Don't be embarassed to ask for bathroom help -- that's a huge part of the treatment, and we've all had issues there... I still count two "stopped up" experiences as the absolute worst part of all of this -- think grown man whimpering on the bathroom floor...
I don't know how your swallowing is but I took stool softeners (two pills in the morning and two at night) when I was taking a lot of pain meds. Folks have recommended to me taking Senekot S. At one point, my nurses gave me something they called "a detergent." I never had to use it but they promised it was powerful stuff. Might want to ask around and force the issue more with your health care folks...
As for saliva, mine seemed to get worse about two months after my last treatment. Of course, I had weened myself off of Saligen pills as well weeks earlier. It's a tad better now but still "Sahara like" at night. I swish with Biotene rinse before I go to bed, and often put some type of oral gel on my tongue and gums after that. It seems to help some... Sometimes I have to keep swishing Biotene throughout the night...
Best of luck to you!!