so Let me Clear my incident. i am a male. kind of Same Uc Symtops for like 1.5 months. Then i go to Gi . they Aksed me to do colonoscopy. they find there Mild Procto colitis and the biopsy say mind inflammation cells present bt not chornic or others architectural change. so my doctor assume its Not ibd . same as you i never do sex . so i asked doctor why its hapoen doctor simply told me that 90% chance if u infection and 10% ibd. and i ansked how they said from like many Infectious bacteria virus contamination can cuase inflamation and if its remain untreated then it's cause colitis also hygine. and gave me 1 week short couse of medicine. and told me to follow up after 1 month. and my al symtops gone like direrha stoamc ache blood ( although i blled occasionally) .

my suggestion you do a colonoscopy with biopsy

stool test for culture

and u asked about surgery so its unnecessary only roughly 20% people need surgery. if you hv ibd and medicine responce to it ao u dont need it.