Old lap chole.
Chest pain unrelenting.
You write your USG is normal (it should be: missing gall bladder).
Don't know whether you have costo chondritis or not, but it can linger on for weeks, and even months...depending on the proper etiology.
It is important to know whether you had any known or unknown blunt injury to the chest.
Next Steps
You can apply diclofenac gel ( Voveran ) on the part which is painful to touch. Twice daily.
NO MASSAGE.
Health Tips
Any mild pain killer may be used.
Voveran SR 75 twice daily for 5 days
Still in trouble, should go for online consultation.
Take care.