At your age of 20 yr, it's very heavy excercise which could lead to serious disc problem.
Usually it takes 6-8 week for relief.
You have to continue with back excercise and has to avoid strenuous exercise.
Also thing of concern is syrinx.
You need a proper neurological evaluation and further tests.
Next Steps
consult a Neurosurgeon near you.
Health Tips
stop strenuous exercise.