Hello
bhujangasan will not harm you at all
don't worry but you certainly need some medicines to regularise you are digestion
as the digestion regularize you will feel nice effect in backache
also do regular morning walk it will relieve backache
consult a good Ayurvedic physician he will prescribe some medicines that will completely relieve your backache
Next Steps
regular morning walk will help
Health Tips
don't lift heavy things
don't bend much from back