hiii dear dry mouth ,, palpitation, sweating all are result of autonomic instability due to anxiety sympathetic discharge from brain in response to stress can cause this xanax is good drug for anxiety apart from drug u have to change life style also main thing to be strong and confident start thinking positively motivating yourself make friends who keep motivating you do exercise do meditations enjoy hobbies music do pleasurable activities think positively and see outer world acc to it see every worries from diff. angle identify small trigger events thats makes u stress and try to modify it get well soon thank u