Hii
From your history mostly you need septal correction.
Mostly this surgery is done under general anaesthesia or it can be done under local anaesthesia also(where operating part only anaesthitised).,so dnt worry about pain and all
Its mostly done under endscopy,so no scar and all.
If you are having troublr in sleeping,go ahead with surgery ,if trial of medicines are already done.
Next Steps
if you send mri report,it wil be more clear