Ok This All Startred When I Went To The Er

Ok this all startred when i went to the er for panic a attack due to stress in 07/2017. Lately ive been able to get a hold of my anxiety lately. But just today my legs started shivering, i got slightly nauseous, dizziness, mild lower back pain and cramping, and tingling ssensation. Ive had my blood tested its perfect as well as a full physical which went really well. Is it stress? Vitamin deficiency? STI?