[gdheiwmow]

That is absurd. Even the doctors in the US generally agree that girls under 18 don't need to go unless there's a serious problem or they are sexually active. Assuming neither of those apply to you, there is literally no reason you'd need to go.

Also stating the obvious, but you don't have to cooperate if you don't feel like it's appropriate or if you are uncomfortable with their plans. You shouldn't let yourself be pressured into doing something you don't want.