RE: What is my MIL thinking??!
Are you going for an OB follow-up appointment? If so, you can probably bring your baby with you. At both of my follow-ups, my doctor was like "where's the baby" and "oh, no baby?", so I don't think they mind. (My son was in the waiting room with my DH both times) And my OB officially has NO bedside manner. If you have an infant carseat you could keep him in there. I think most doctors would just assume you wouldn't want to be separated from your baby at this early stage, especially if you are breastfeeding.
Deb
Mama to my guys, K (May '03) and Q (June '07)