My whole body feels itchy, sore and tingly. i used to be a celiac but it may have came back. how long does it take for wheat to escape my system?

Celiac: Celiac does not "come and go." you either have it or you don't. It is an autoimmune disease, not a food allergy. It is an intolerance to "gluten" and not specifically all wheat products since not all wheat contains gluten. Elimination is variable but that should not have anything to do with your complaints. Maybe you are too focused on one condition to look for something else.

Vague bodily ache: Celiac disease is a well defined disease due to gluten sensitivity that affects your small bowel causing diarrhea and symptoms associated with malabsorption. Thus it can cause muscle cramp, iron deficiency anemia and genalized weakness... Symptoms resolve 4 - 6 weeks after avoiding gluten. Other gluten sensitivity syndromes present with vague neuropsycho motor symptoms we don't know much about.