Greetings, sorry for the prolonged pain. what You did was correct by undergoing physiotherapy, but did you follow all instructions as advised by physio. I am not sure what type of treatment was given to you. You are suffering from poor muscle strength at abdominal areas and nothing else, just continue physio.
Next Steps
hire a physio as your trainer for 3-6 months and physio should have knowledge about trigger point therapy and posture correction. your problem will be solved in 10 days and continue program designed by physio.
Health Tips
if any questions do let me know