i have been having the worst axiety / panic attacks ever. it always happens at night. my chest gets tight, i get shaky, irritated, my chest hurts, i always think i'm going to die in my sleep, my heart races, i stay up half the night, (sleepy or not) because i cant seem to calm down. i cry because i cant hardly explaine to my fiance how i feel and make him understand. i have had all the heart monitoring and stuff. my dr. gave xanax that he want me to take 3 times a day and lexapro in the morning. i only take my xanax at night cause i cut hair all day and i don't take the lexapro because i don't want it to make me feel sleepy. i need help. am i nuts. at times i feel like my chest in so full and tight. the xanax helps at night.