A warm welcome to the forum bbellee!
It sounds like you have a lot of pressure on you and my heart truly goes out to you.
I believe most of us need support and guidance at certain stages of our life. With me having spent time in depression some years ago, I've always encouraged my kids to seek help if they need it. I've taught them 'Mental, physical and even spiritual health are things to be carefully managed'. I actually got a bit of help myself not too long ago, which made a huge difference to me. By the way, if I got a call from the school counselor, I would see this as a wake up call to help manage what my son or daughter was struggling with.
It's important to speak with someone who understands the complex nature of mental health. Mental well-being doesn't just involve our thoughts and emotions, it also involves certain systems in our body as well as chemistry. There are different strategies which can help with the mental and biological aspects of anxiety. For example, learning the skills involved in 'Emotional Intelligence' can be life changing for some. The idea that a particular emotion becomes our cue to begin thinking, means we are not left feeling victimised by our emotions and the chemistry which fuels them.
Another aspect of our chemistry relates to food. Weird when you think about it but basically everything we put into our body produces a chemical reaction. If your food is being restricted, I'm hoping this is under the advisement of a dietician. My 13yo son and I went vegetarian last November and before we took the plunge I did a lot of research as well as consulting a great dietician who taught me much in the way of food and function. Poor diet/gut health can definitely impact mental health. Serotonin (the 'happiness hormone') can be greatly impacted by diet.
bbellee, sensitivity is a strength not a weakness. Can you imagine a world where everyone was a little more sensitive. We need people like you in the world. Harnessing sensitivity and being able to use it to our advantage requires some skill, which you can learn.
Give thought to speaking with the school counselor, even if to say 'I don't want you to talk to my parents, I just need you to advise me on speaking to them regarding my mental health and further counseling'.
Next time your parents involve you in their arguments, try walking away. Doing this involves a level of maturity you should feel proud of, given the circumstances. You are their gift (their child), not their mediator.