My pleasure, glad it's helped a little. The not knowing is horrible isn't it, and causes so much worry. I didn't mean it to sound like I'm not constantly worried too, but if I try to have some sort of plan (however small) it helps to manage the worry. So I'm thinking about things he may need to be able to do in school and trying to make small inroads into those things, self care especially.
For us, finding a way to join him in the things he really, really loves has helped massively and has been the biggest influence on his progress I think. By that I mean the things that he is a bit obsessive over. Rather than being scared of them as I was (I worried about how insular they were and how much they took him away from us and others when he was "in the zone") I decided to see if I could somehow join him.
He's obsessed with travelling on buses and trains and I've always found them quite hard to share with him. He would often ignore me when I tried to speak to him or pointed things out on our travels. He was just too absorbed in it. It was frustrating as he's generally a social chap (although he's always struggled with speaking) and I just couldn't find a way in. Took me quite a while to realise though that even when he wasn't looking at me or seeming to listen to what I was saying or showing him, he was still taking it in. So I persevered, by basically being really annoying 😊
I tried really hard to speak with the same enthusiasm I saw he had for them, even when it seemed like he was paying me no attention. I would speak excitedly about the journey before we went out and then would recount the story during the day. I'd deliberately get the destinations or directions wrong, correcting myself in quite a dramatic fashion, just to try and get his attention really. It was a great way in; it turned out that he really loved that I was mad about these things too and it ended up opening him up, improving his language and especially his interaction. Now he actively wants me to be a part of these moments and will call me/ look at me expectedly and burst out laughing when we have that moment of shared connection. I never, ever thought that would happen. It's has been a catalyst for spurring on his development. He's has so, so far to go but it's made a difference.
Sorry this is so long. I guess I'm trying to say that there is so much to fear all the time. When I decided to stop worrying about something I couldn't control and tried to find a way to make it work for us, everything got better. His speech and our interaction especially. I know this is very particular to us, but I also think he was just older and ready to take things to a different place. Lots of things he just couldn't do a little while ago just seemed to click. I'm sure your little one will reach that stage too as he gets a bit bigger.
My DS is really happy in his pre-school so I think we will try and keep him there for reception. We're checking out all options though. I don't know how long he will last in mainstream but he's happy and settled and for a child who can be very (very!) resistant to things that is such a blessing.
Does your DS like his preschool? Do they have a good understanding of him and his needs?