Birth control..Weight Gain

Wow it seems like maybe I should try the IUD.  I really don't wan't these pills but I don't want to be pregnant at 46!!  Not like I'm having sex all that much but it only takes once right!    I am trying to better with my water between meals.  And I think after this Graduation weekend I'm going to try that 5 day pouch diet.  Guess I will call my doctor and inquire about this new IUD.  Thanks for all the response.  I am just worried about this increase appatite and small weight gain.