Hello, I am 19 years old. The past nights as I’ve been trying to fall asleep I fell asleep and 5 minutes or something around falling asleep I wake up to a fast heartbeat and I begin crying and trembling and I feel like my face is numb. When I checked if physical wise I am healthy everything seemed ok, do I experience any sort of anxiety that comes at night? I have been mentally stable my whole life and never had this feeling, and when I experience this I feel so awful, what is happening to me?