I have a dd1 with undiagnosed anxious/panic tendencies. We took her to a psychologist for educational testing at the request of the school because they were so baffled by her behavior, but she did not get an anxiety diagnosis. She got an ADHD diagnosis which I don't agree with and a NVLD diagnosis with the caveat that she might outgrow some of the LDs. I think she has. She didn't meet the criteria for an anxiety disorder, but I know that it was anxiety that was causing her learning issues and not the other way around. She's been this way since birth, well before she was in a formal educational setting.
She doesn't carry anxiety around with her all the time like many of the PP's kids do, but in many situations that wouldn't bother other kids she will have an anxiety/panic attack. She has matured so much in the past few years, though. She had horrible, horrible separation anxiety as a preschooler (4 yr old) and in K, 1st, and some in 2nd and a little in 3rd grade. We had many many, many school refusals and huge meltdowns. She's primarily outgrown that now, though. Her anxiety affected her school work, too. She was too anxious to read. She refused to work with the teachers at all and would cry and melt down if asked to. She didn't like to work with me or DH either. Finally it clicked this year and she's doing great and reading Harry Potter 4 on her own. Any new thing that she doesn't already feel confident about makes her anxious. So she gets anxious about long division or multiplying by 2 or 3 digit numbers, but she can work through it much better now. Socially her separation anxiety is so much better. I think she would still feel anxious in an unfamiliar setting — like I would be greatly surprised if she would consent to being left alone in the IKEA kid's play area while I shopped. She'll be 10 next week.
So, for the PPs with little kids maybe we offer a little bit of hope. The separation anxiety is almost gone and I did not do what all the experts and teachers recommended, either. No yanking off the bandaid for us. She is really doing great on her own curve. It's a tightrope, though.
Anyway, I just wanted to sub. Her situation seems to be a little unusual in that she doesn't carry the anxiety around with her all the time, but she just has anxiety/panic type attacks in reaction to a situation. I really liked the psych we took her to, but dd1 just didn't fit into any of the round hole diagnoses. She's too much of a square peg. Her anxiety does definitely affect her learning and her day to day life, though. We've just found our own way so far.