Problems or fear

Fear manifests in many ways, it's not cowardice, it's a lack of courage that paralyses the mind of all rational arguments like panic. Not sure where I read that but it's about right. When problems overrun the mind I can't seem to enjoy or concentrate on what I'm reading because of work distractions, It's like an overflow I can't switch off in my head. Compartments are flooded with office issues. No compartmentalization is possible. Is there a name for this ?