My son, 32, started having numbness in his extremities, cold hands, purple at times, very fatigued, faint upon standing, even when doing dishes at sink, shaking, heart racing aching legs, hard to stand a long time, really tired, checked his blood pressure was 170/90 went to hospital, blood test, checked heart, low vit. D anxiety attack.....taking vit.D anxiety meds. About 5 days condition not changed, more fatigued, aches and back pain. More test, Swab up nose for flu and mri. Can t find anything wrong! Stretched his legs out on floor this evening pain and numbing got worse! He is so scared doctors can t find anything and he knows something is wrong inside he says. He had surgery on his heart 5 years ago for a valve on top sticking, it was burned to fix it. But all the test they ran in last 2 weeks came back fine.