Meeting anxiety

I have a meeting with my son's teacher this afternoon to discuss some behavior problems, and I've been in a tizzy about it since the appointment was made. When do I get to the point where I'm no longer thrown into stress overload by these things? I've been having meetings like this for 10 years, since he started special-ed preschool at age 3. I've stated my case plenty. I've stood up to some pretty opinionated educators. I've gotten my way more often than not, and have generally had good and respectful relationships with his teachers. I even write articles telling other parents how to have meetings. Yet any time I'm called in to discuss things, I feel like I've been called to the principal's office. Am I going to get detention? Am I going to be expelled? My stomach's in knots.

And the thing is, I do want to have these discussions. I want to be called in to confer when there's a problem. I don't want teachers to feel that they can't talk to me because I overreact so badly. I just want my entire neurological makeup to change so that I don't seize up like this. And hey, while we're at it, we can just change my son's entire neurological makeup so there will never be a problem. Ha!