A'smom - I sure sympathize with the preschool struggle. My son is a regular disruption in his class, in particular when he is out of his routine - which is all the time in the holiday season when there are so many days off from school. I also hear you when you question your parenting abilities - I would be lying if I were to say that I never feel the same way. If there was something I could do differently, if I were a better parent, if I only knew more. But rationally, what I truly know is that my son is just different and he didn't come with a manual. He did not come with step by step instructions as to how to be his parent - I just am. I also know that all I can do is to learn what I can and be as patient as I can.
I think what matters most of all is that our children know that we love them, that no matter their struggles, their challenges and their amazing moments, we love them not inspite of their sensory issues but because they are who they are, sensory issues and all.
That all being said - I am unsure what else to do to advocate for my son either, I am glad to ready you are receiving OT, that is our current battle. Hang in there.