Pattimuss, find a peaceful place. The beach, a park, somewhere you can sit comfortably for a while.
Look within and see if there is not something outside your physical self causing you a lot of stress. Is there something you need to do? Something you did you shouldn't have? Something you don't know how to do, or maybe even what to do, but you know something needs doing?
Go deep and look hard.
Good luck.
May the WeedFairy find you and bless you with the strength and wisdom to see the truth and do something about it.
Respect the Duck.