Hi PN and welcome!
We have had so many young people in their first year of school post with similar issues...so know that you are not alone!
I do echo the above advice to see your school's nurse...just to get checked out and be sure that you are healthy, and not dealing with another illness. While you are there, you could also discuss your anxiety, and find out if there are any school counseling programs that could be available to you.
This will give you a place to start in dealing with the anxiety and symptoms that are currently bothering you.
I am also going to print our
Resources here. This is a collection of information and great self-help material. There are coping skills, relaxation exercises, and even specific help on managing health anxiety which may be of benefit to you.
https://www.healingwell.com/community/default.aspx?f=9&m=104206
Keep talking with us, as support is also a great form of dealing with what you are experiencing...we understand and care!
Talk to you soon,
Scaredy Cat