For me, those feelings come and go. It's been really good lately, as we've been on an even course, and I am currently having more issues with my NT daughter than my AS son. But, there can be times when it cycles back.
It has helped me so much joining communities like this one, because the posts by Aspies themselves have really helped me get inside my son's head. It was a relief to understand that he just needed to stim, and once I let go of trying to force those behaviors out of him, and learned to smile at them instead, we all got so much happier. It has been over a year since we've had a major meltdown.
But, in those times when the major meltdowns occur, I really, really worry about the future, about having such an occurance when my son is larger and stronger. Which is why we have been so very proactice about getting to all the cores of his stresses as quickly as possible. The less build up he has, the better.
Things are always changing, and the transition times, before we've figured out how to deal with the problem, can be really tough. But when we've set a course that seems to be working for the moment, it is lovely. I breathe, and rather forget what it is like during the rough spots.
You will have your moments of smoother sailing. Keep reading, keep talking, keep advocating for what you believe your child needs.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).