Adrianna's 2 week check-up

Today I took Adrianna to see the doctor for her 2 week check-up. The nurse forgot to write which percentile she fell into for all of these numbers, so I'll have to remember to ask her to do that next time!
*Height: 20.5 inches (she shrunk!)
*Weight: 7lbs, 15 oz. She gained 13 oz in 9 days!
*Head Circumference: 36cm
Other news of note is the physician was happy with the fact that she is pooping several times/day on her own and I haven't given her a suppository in over a week. Also, since she is being exclusively breast fed, he wants me to start her on an vitamin supplement that has extra iron in it. There are two downsides to this. 1) It tastes horrible and he said that a large number of children/babies won't take it due to the taste. 2) Iron tends to make people constipated and I'm worried about going back down that road. I'm still torn on what to do about it because, of course, I want her to be as healthy as possible but I feel like she should be getting everything she needs in my breastmilk. Also, realistically, once I go back to work, I won't be surprised if we have to supplement with formula because she eats constantly and I just don't know if I'll be able to keep up with her demand. If that's the case, formula is fortified with iron and that solves my dilemma.
All in all, we had a very successful check-up and she doesn't have to go back until she is 2 months old! Unfortunately, she will have to get shots at that visit and I'm not looking forward to that. Also, I will have to take Brock that day for his 2-year visit! Holy moly! I can't believe how big he is getting!