This is exactly how I feel most of the time. There are so many things I'd like to try with my son, that all the variables become so overwhelming! For the most part, I try to remind myself that eliminating all the things I have so far, can only be good for all of us, even if we don't see a direct improvment in the tics.
I'm happy to report that we are about 2 weeks out from the installation and the tics have calmed down a bit. Not sure if it's because all the dust, etc. has calmed down in the house, or that would have happened anyway. Guess that's always the question. We are due to have installation start up again in a few weeks in the sunroom, so I'll be keeping my eye out for any increase once we start that.