Hi thank you for your reply.
I unclipped the mirror once more and noticed there are a couple of clips inside one of which had come away from where it was supposed to be. I clipped it back on and reattached the mirror and it is a lot more stable and not wobbling like a jelly. Rain sensor seemed better but when the road is bumpy it seems to unsettle it so the wipers go a bit quicker.
Not sure about the auto dimming mirror as I've not really used it in the dark yet but we'll see.
I did have the same thought about glass fitters so I messaged autoglass but they said they don't do that kind of repair unfortunately.
I'll see how it goes for now.
Cheers