Anxiety help

Please help I don't know what to do. Anxiety for me is getting worse and I can't do anything to stop or help. I haven't told anyone ( including family and friends ) and I'm struggling so much. I just don't want to go on like this anymore yet I just can't talk to anyone. I'm ashamed to feel like this. I just feel pathetic and there's much worse things going on for me to just feel sorry for myself. I just want to be a confident person that everyone wants me to be and because I'm at the age where everyone is getting jobs, and I "should" get a job. But I can't. My anxiety means I'm terrified of new things and messing things up. I'm too afraid of not knowing what to do and I'm so unconfident that I wouldn't ask for help.