New pain 5 weeks pp, not subsiding

I was given the all clear from my doctor at my four week appointment to start gentle exercises. I was feeling totally fine and went on a nice long walk and then did some physical Therapy moves like birddogs. Later that night I started getting burning on my right side and over a week later it has not subsided. I’ve been resting but the pain isn’t getting better. It doesn’t seem like any pain medicines work. Has anyone had this? I’ve also had more fresh blood which the doctor is not concerned about. the pain feels like a burning/searing sensation  and is intermittent throughout the day and night.  my doctor thought I could be nerve pain and another doctor thought it could be a torn muscle. They want to send me for a CT scan next week. Has anyone had this?