Greetings, your concerns are quite understandable. Poor posture causes reverse curve, correcting the posture corrects the curve. you should be having a forward head posture. X ray if attached would be of great help to guide you.
Next Steps
get to see a physio specialised in posture correction and your problem is solved. surgery is not necessary in most cases.
Health Tips
if for various reasons you could not find solutions do let me know will assist you to correct the curve.