Isn't there a point where having too many colposcopies is just too many in a year?

Probably yes. But how many is too many depends on what problems you are having. If you just had a complicated cancer surgery, you could have had a couple before surgery and another after surgery when you have healed well. If you have bleeding from abnormal blood vessels, they might need to look again. If you have scores of polyps they might need to scope a couple times to get all. Best to ask dr. Why again?