Hello Amanda, I went through your query and can understand your distress. From what you have mentioned, you seem to be having Agoraphobia which included fear of closed spaces (claustrophobia), fear of crowds, fear of being alone. You seem to be having panic attacks if faced with these situations. In addition, the symptoms pf feeling that everyone else is laughing at you or judging you can also e due to social phobia. I would suggest that you consult a psychiatrist for complete evaluation. You can get rid of your anxiety and fears with treatment with selective serotonin reuptake inhibitors like sertraline or paroxetine. In addition, you can also opt for behavior therapy which will help you in relaxing and gradually remove fears regarding the mentioned situations. I do hope that I was able to answer your query. Wish you all the best.