Thanks so much for your kind response! In retrospect, there have been so many signs of SPD all along, but I didn't know what to make of them. I don't know all of the SPD terms, but I'll describe what I see as SPD symptoms. He hates to write, has poor penmanship, he hates paint and glue (too messy). He is a very picky eater and is sensitive to strong food odors. We had pork and sauerkraut for New Years (local tradition) today and I had to light a scented candle to get him to sit in his chair instead of hiding from the sauerkraut smell under the table. He wouldn't eat his roll until the offensive food was off the table. He hates groups of people, especially crowds and strangers. He bit me in the mall yesterday in the middle of a meltdown. He can't stand public bathrooms with noisy hand dryers and/or automatic toilets. He loves to pet our cat, but is frequently unintentionally too rough. He compulsively picks at his thumbs and washes his hands "because they're hairy" (he says crayons are hairy too). He is hyperactive, but complains that he's tired all the time. He will also complain about being hot when it's cold outside. He is a sensory seeker, if I understand that term correctly (jumping on furniture, amusement park rides, playgrounds, video games, etc). He has poor gross motor skills (swings, riding a bike without training wheels, playing catch). And the list goes on . I feel like I need a plan in place to deal with the big picture, especially the toileting problems, but I'm not sure who the appropriate person is to get that plan in place.

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Oh, and yes he has a terrible time transitioning. We got him a watch for his birthday, and that has been very helpful with transitioning, since it gives him a sense of control about when to stop, or how long something will last. We joined a homeschool co-op, but he is having trouble in the group setting (as usual).

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But I have to admit, there are upsides, sort of. He can't tell when he is sick, he will insist that he is fine up until the moment he is vomiting. So I never have to deal with him exaggerating or faking illness. Unfortunately, though, I think it has the same root as his inability to know when he has to go to the bathroom.