Yeah i do those things too, with whats going on in my life right now, i tend to shut myself down alot now. Sometimes im that crippled with anxiety & so low that i completely isolate myself, i start going in & out of a catatonic state for days or weeks, i cant physically move, show emotion, i cant even speak, i just become so numb from everything, its so hard to break out of that state sometimes, other times it helps me to just stop & deal with everything racing in my mind, or i just become frozen in one spot for hours & i have no idea of what day or time it is, it can be hell!