took an afternoon nap, when woke up I started to feel very heavy, like my body would weight tons, and suddenly racing heart, feeling like I'm dying.. I still feel like this, my hands are shaking, whole body is, and feel like pressure is crushing my head, heavy feeling in lungs... I took one tea spoon of liquid hydroxizine, and still feel like this... it is possible to really die out of panic attack?... because I feel like, i told this to my mom and she only yell at me... i'm so f!cking scared...