I've been dealing with this chest pain since March last year. Initially, my doctor said it was costochondritis, and all my tests like X-rays and CT scans came back normal. But recently, whenever I do chest exercises or stretching, the pain gets worse. It's really starting to freak me out. Can someone explain why this is happening and when I might start feeling normal again?

Patient is advised tab aceclofenac 100 mg orally ,twice daily for 7 days ,physiotherapy and mild exercises.