I Have Anxiety

I have never been diagnosed with anxiety but it seems like I have some testing anxiety that makes my whole body go into defense mode. I really feel like it is not talked about a lot but it causes a lot of pain in my life. Especially now with online schooling there is no one around me to help calm me down and it feels a lot like the end of the world when it's just a simple test (doesn't help that I put a lot of pressure on myself). My body starts shaking and I go through heat/cold flashes. I even started to feel like throwing up and gagging from fear (this is a new, just recently started with the online school) and I don't know how to handle it at points.