To be honest Jenny, I would be watching Sweety very closely - as I'm sure you are. I know that she looks and could have a little while to go yet, but her udder is at the point that it could fill very quickly as she goes into labour.
I cant remember if you have a home camera set up that you are watching? If not then pay particular attention to Sweety's 'moods' during the daytime. Many years ago I had a little mare that was never particularly friendly, but two weeks before her due date and with very little bag, she kept following me around everytime I went into the field. In my stupidity I just thought it was her 'changing a bit' due to being soon to foal. She foaled that evening in her stable before I went out for my first evening check and the foal never got out of the bag.
Well, we are all wiser, sadly, after the event, but since then I watch my mares like a hawk for ANY changes in their normal way of doing things, so just wanted to give you an example of what can happen to any of us, especially, as many of the others will know, when we just pop to the loo, or misread the signs and go indoors for a quick cuppa!
Glad to hear you got a good night's sleep last night - hope you get the same tonight and then feel even better tomorrow.