Re. Trying to work from home when there's a 19 month old autie around the house.... Been there, done that, got the t-shirt.
Unfortunately, in my experience it just doesn't work, and does not get better in the next few years. Of course your kid may be very different from mine, but I would recommend to separate her from your boyfriends work, so they're not in the house at the same time. Either he finds another place to get his work done, or someone takes your daughter out of the house while he's working, or some combination. Probably easier said than done, I know
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Father of 2 children diagnosed with ASD, and 2 more who have not been evaluated.