dd1 used to be a highly anxious child.
we sorted her school, and sheis in the perfect place (for her). thye too continually push, and have got her achieving/doing so much more than she ever could. her IEPs (changed every half term) are all completely ticked off, with a total new rewrite for the whole lot (they are pages long, not just usual 3 target stuff)
recently, her anxiety levels have gone through the roof again (and again, and again ). dh and I have been talking about it, and in part, we think it is because of the progress. obviously, dd1 feels a certain loss of control along with the breaking down of routines and changes that learning/becoming independent brings about.
but also, we realised that dd1 has always had these periods of high anxiety - they used to come every 10-12 months, and last for abit, driving us to distraction - lots of worry about stopping progress/regression, and then jsut when we were absolutely at the end of out tethers and on our knees with it all, something clicked into place developmentally, and it all improved again. kind of like brain filing, in a way. new skills being learned, and brain connections needing to be made/remade etc
and now that she is somewhere where she is learning so much more, at a much faster pace (to us, if not to her), then these episodes are coming around much more frequently - the reboot is needed far more often, iyswim.