Yes. I think it is part of my GAD. Occasionally, I get very high anxiety during the situation you describe...hanging out, not doing much. My anxiety morphs into what feels like a foreboding fear. It's very unsettling. I feel like something bad is going to happen and that something is very, very wrong - but I do not know what it is. It's a horrible feeling. For me, it often is a sign of potential psychosis.