I was on half of 500mg of Serenace for a week. Didn't feel a thing (its for anxiety). Now I am really really scared because I was off it for 3 weeks and suddenly I woke up and the front of my head felt funny. Like I couldn't feel my emotions. Its hard to explain, basically I can feel happiness/sadness in my body/stomach but not in the front of my head anymore. its freaky as hell. What is this? It feels dead/numb.