What's wrong with Macy?

Ok, so we went to the doctor today to have Macy's weight checked and she weighed 23.5 lbs. Not much at all, I know. I think my 8 month old nephew has already outgrown her. She had lost weight since her last check. It's very frustrating because you try to do all these things right and she still isn't gaining. Another problem we have been facing with her is bouts with diarrhea. She has been having them off and on for several months. It's no wonder she doesn't gain. I mentioned these concerns along with a few others with my doctor and she has decided to run a number of tests on Macy. First we are in the process of trying to collect a urine sample, I have to get about 4 different stool samples (not my favortie thing to do..AT ALL), and then they are going to run a series of blood work tests on her. They are going to test her thyroid, test her for celiac (since it runs in Brad's family), a metabolic tests, and a few others. We will go get this done tomorrow and hopefully hear something back before we leave on vacation this weekend. I'll keep you posted. Her doctor has also told me to put her back on infant formula (Next-Step Soy) for now at a 24cal count. Hopefully doing all of these things we will figure something out. If we don't find something out through these tests and the diarrhea continues we will be sent to a GI specialist for further testing. Please pray that it is something minor (like she's just going to be petite but healthy) or that it's something we can fix easily. I know that God is in control. I'll keep you all posted with the test results as soon as I hear something back. Till then.....