she may well not be able to identify the exact source of the anxiety,
rather than focusing on finding the source, talk about the process,
take the phone of the hook, cuddle up together and explain you hate seeing her anxious,
and you would love to help her find some way to find some coping strategies , because it can't be nice to be worried and stressed,
say lets have a think together what we can do,
suggest things like,
would it help if when I am going anywhere I tell you, so you know, that way you always know, I promise I won't go anywhere without telling you, would that be any good, how shall we work this,
have you got any ideas what would help ?
I bet we can find some solutions,
now lets work out what we have to make better for you,
Go slow, don't rush, let her lead,
night pants for bed wetting will take the stress out for her, she will give them up don't worry, if she has a pack she can decide when she wants to use them, always have a spare mattress cover and sheets, duvet with cover on , ready in a bag, so changes in the night are as hassle and stress free as possible,
that bite would worry me,
but if you gentle go through all sorts of scenarios with her of possible ways which would help her feel secure you will get to the bottom of it.
and remind her gentle throughout the process, that no one should ever make her feel she should keep secrets from you, and you will never be cross with her.
and no one can ever take you away from her.
do not try to do this in one big serious sit down, lots of gentle reassurance and solution seeking together,
if she knows you are on a quest together to find the source of her worries , so she can feel safe again, eventually she will take that leap of faith, and identify, then share with you.
she has to trust the process, so don't rush it.
good luck.