I think I have anxiety… now what?

I looked up Anxiety on a psychology website and it gave symptoms and I have all of them: Muscle tension, Physical weakness, Poor memory, Sweaty hands, Fear or confusion, Inability to relax, Constant worry, Shortness of breath, Palpitations, Upset stomach, Poor concentration. It’s pretty much affecting my day to day life. I get panic attacks every now and then and I feel anxious all the time. I don’t know if I have anxiety but Im sick of feeling this way. Im short of breath and my heart beats so fast all the time. I always feel a clenching in my chest. Public wise I have certain things that I have to do in order to feel “safe”. I like to get to school early so I can sit in front of my class so no one will see me, I have a paranoia that people are always judging me and watching I cant sleep at night coz Im always worrying and theres so much more (but no space to type) Im just tired of living my life in constant fear and worry and feeling sick about it all the time. I dont know what to do