4 Months old

So Sarah turned 4 months old on Friday 11-11-11. It has been a rough past 6 weeks. She has been in and out of the hospital. We are not really sure what is going on other than she keeps screaming out in pain. The drs say that they can tell she is in pain, but are sure what is causing it. She has had so many different test and we still can't figure out what is happening. Besides that she is doing good. She had her check up today and she is now 11lbs 7oz (8%) and 23.75 inches (25%).