I have social anxiety and i've had a job in retail for a month. my anxiety has got much worse is this normal? and will my anxiety get better?

Congratulations on: being able to do the job you are doing w/social anxiety. The job will be very helpful to you in learning to manage your anxiety. Seeing a mental health professional can help speed that process up. Do you exercise? How's your diet? These all help. "The Relaxation Response" book by Herbert Benson is good for self-help. Peace and good health.