Can extreme anxiety cause your body to ache all over, stiff hands and feet, tingles onextremities, headaches, fatigue, cold feeling, no concentration?

Yes. Anxiety can cause all those symptoms. It tenses muscles, which after awhile can get sore & ache all over. Please see your physician and have a good going-over for general health. You will probably benefit from treatment for your anxiety -- psychotherapy can be very helpful, and there are medications which can be used if needed also. First task is to understand the nature of your symptoms, tho'.
Yes. The more anxiety a person generates, the more the body will revolt and create all types of untoward problems. Please contact your primary care doctor or a psychiatrist for help with this conditon.