DAE ever find themselves unable to sit down

OK, so I've had GAD for a while and I've gotten the day to day attacks down to manageable levels. But I still experience one thing in particular especially when studying or coding (I'm a SE major). When I'm studying/working and I start to make mental connections I start to get racing thoughts extremely fast of all the possibilities and I find myself physically incapable of staying seated and I am forced to get up and pace for some time until it passes (usually several minutes) does anyone else get this or know some good ways of dealing with it?