How do Proctologists and OB/GYN's differ?

they deal with totally different body parts and functions

There are two completely different specialties.. OB/GYN deliver babires, so GYN surgery and appendectomies etc; and do all manner of womens health and often some primary care. Proctologists which is a sub specialty of general surgery and actually do colo-rectal surgery and treat disease of the colon.

Ask local adults for actual info locally as it varies greatly depending on what country u live in