hi, i also suffer from anxiety, i have the both symptoms that you mention, among many more. it feels like a dull ache of throbbing, somethimes feeling like restless leg syndrome, i also have the twitches, mainly in my legs but i sometimes have them in my arms and neak when im dropping off to sleep but also in the day, i also worry that i may have cancer. my symptoms have got that bad i sometimes think that my whole body is riddled with cancer, my chest hurts, my tummy,my back it goes on and one, i also have shocks go though my head and every other part of my body, please dont worry about this, you are not alone, i am on the anxietycentre.com/ website and its comforting to know other people are having the exact same symtoms,
take care,nicky