Guys help!!

Guys I am a teen and I am suffering from anxiety issues because of my school..I mean I have some seating arrangement problem because if which no one wants to sit near me and for that reason,I went to my class teacher..So.today another girl was agains sitting on my assigned seat and I was so angry and annoyed so I took her to our class teacher and they were acting like it was all my fault..So I got so angry I kind of talked to them in a loud voice which the class teacher told me not to “shout”…I felt very humiliated..Of course I shouldn’t have spoken in a loud voice but that doesn’t mean I don’t feel anything..My class teacher has always disregarded my issues and expects me to adjust every time..If that wasn’t enough,the principal of my school is conducting Extempore and I have public speaking issues..I am so tensed and stimulated all the time..

Pls help me survive in this school..