Hello dear,
Given the medical history that your blood work,
stress test and Echo are within normal limits, any Cardiovascular cause for your symptoms can be ruled out.
Under such circumstances, the symptoms as mentioned in your post can be attributed to:
1. Para
spinal muscle spasm & compression of nerve fibers due to maintenance of incorrect posture.
2. Entrapment of nerve fibers at the Lumbosacral spine or lower limbs.
3. Dietary deficiencies of certain nutrients like Iron, Calcium, Vitamin D, Vitamin B 12, Folic acid, etc. which help in blood formation & nerve conduction.
Symptomatic relief can be obtained by intake of nervigenic agents (like Vitamin B6, Vitamin B 12, Folic acid) as well as
multivitamin & multimineral supplements including iron, calcium & Vitamin D needs to be added in your diet.
Physiotherapy & postural exercise will also be helpful.
If symptoms still persist, kindly
consult a Neurologist & get a complete Neurological examination done.
Certain investigations like nerve conduction studies will be helpful to rule out any pathological cause for the symptoms.
Wishing you a Good Health.
Take care.