Sometimes practices get busier as time goes by, but that is no excuse to let your bedside manner lag. If it was me I would be looking for a new Ob/Gyn regardless of how long I had been seeing them. I would also let their office know how I felt. Nothing will change if you just quit going and find a new Dr. You will just be another patient who disappeared. If you let your feelings be known at least you may save another patient from going through the same thing if the Dr. has any heart or just doesn't is not aware how his practice has changed.