Sounds like you have a lot on your plate, wintergirl
As someone who stopped with her T before she got established with a new one... I have to tell you, I sincerely wish I had continued to see T while looking for a new therapist. So I think if you can swing it, seeing two therapists through the transition may not be such a bad thing.
Have you considered marriage counseling, to help with the communication issues between you and your H? Do you think that maybe if you guys could communicate better and empathize better, things might generally be better?
Also, it is extremely stressful to have kids on the autism spectrum. Are there any kind of support groups for moms near you? It can be nice to hang out with people who know exactly what you're talking about, and what you're struggling with at home, and with school (if your kids are old enough).
Stay strong!