Definitely keep yourself busy with something - a good book, a movie or tv show. I found that a night at the local pool - one with a hot tub as an added bonus - and a glass of wine helped keep me relaxed. Should have hit the pool more often when S13 was away at camp in July.
Let H do the worrying about the school timings. He's got to learn to do it. Do the school know that you have split? I called my son's school today to tell them and got told they needed to see the custody agreement. H and I haven't sorted that out on paper yet so now I've got to go into the school and discuss the arrangements with them. I may have to push H to sign an agreement just to keep the school happy.
Take care of yourself and stay strong.
Both 50 S14 M 16 yrs (his 3rd; my 1st)
ILYBINILWY - 24 Dec 2012 H moved out - 27 Jun 2013 Legally separated - 6 Sep 2013 Closing the door and changing the locks