Are these signs of social anxiety disorder?

Every since I was like 5 years old (kindergarten) I NEVER wanted to play with kids my age. During recess I would hide so no one would play with me. I had a hard time all the way up to 5th grade. But it got even harder in middle school. My hands would shake every time I went to school. My parents would take me to like party's during the summer / friend get together about 40 people I hid in the bathroom the whole time. In high school my anxiety really got worse I would worried ALL nite about having to go to school the next day to the point I'm throwing up my nerves are so bad. I could not even learn at school I had cold sweats and felt like I was going to throw up the whole time I was their. Everytime I go to the doctors my blood pressure is high........But it's not a fear of people I have - I dont think.....I have a fear of elavotors though - I p out in them. The anxiety took over me and when I switched over to online school my grades went up from D's to A's. I feel like im trapped .... I stay up till 7am in the morning worrying and wake up at noon. I dont know how to bring this up to a doctor or my parents ,.,,,