Sorry the last few days have been rough. The transition to S is hard. It's disappointing that your H isn't around more for the kids. Apparently he thinks he needs that much space though, and you have to give it to him.
Do you have any fun plans for your vacation from work? Can someone help watch the kids or can they go to their daycare for a day or two so you can have some time for yourself? I think you need to take this opportunity to really take good care of you. You are going through some really stressful things and you deserve some time just for yourself to rest and relax.