Hi! Sorry I have not responded to you sooner. Last week has been pretty tough here. Medical issues with my daughter - and it IS hard to watch them, no matter what the problem. Though anxiety does seem super-hard to me, at least as a parent.
You say she has a lot of sensory things. Has she seen an Occupational Therapist for a thorough evaluation of sensory issues? My youngest has Sensory Integration Disorder, his brain does not handle all the input it gets the way a "neurotypical" kid would. Certain things are intolerable, drive him nuts, or just plain freak him out. And what he finds intolerable, chances are one of the other 2 will crave. Or what he craves drives someone else nuts.
An Occupational Therapist (OT) evaluation is usually a very useful tool to help figure out how best to help kids cope. I know that the multidisciplinary evaluation we went through with our oldest did NOT include this, though I have no idea why it didn't.
What ends up helping many many kids with Sensory Integration Disorder (SID) and other sensory issues is brushing. It needs to be taught by an Occupational Therapist (OT) (occupational therapist) and at first we had to do it every 2 hours except at night. I thought it was a lot, but it is non-invasive, involves no medicine, and the risk seemed low, especially compared to many of the medicines. After a while you do it less often. Last year one child in my son's 1st grade had brushing done at school by an aide or the teacher. (Wouldn't ya know - soon ALL the kids wanted it!!).
It is one more tool you can explore. And it usually has a much lower risk of side effects than medications.
The best book on Sensory Integration Disorder is "The Out-of-Sync Child" by Carol Kranowitz. It explains things very well. For sheer usefulness, "The Out-of-Sync Child Has Fun" by the same author is AMAZING!!It has a lot of activities for each type of sensory input the person needs. MAny of them do not require special tools, or the tools/ingredients are very common (meaning that you do NOT have to spend a fortune on special equipment that will be outgrown). I can't think of any activities that would hurt anyone who did not have Sensory Integration Disorder (SID). So all the sibs could do them together, unless it just felt bad to one of them.
Occupational Therapy for Sensory issues can help a LOT with anxiety. I know that when my son seems really anxious brushing more frequently helps a whole lot. So do certain other activities, but each kid needs different things. (It would just be too darn easy if they each needed the same thing, wouldn't it??)
Glad you found us (but sorry you need us!).
Hugs,
Susie