What goes up must come down!

Just when we thought all was well with Max we got a hard hit. He has been throwing up all of the formula that goes into his tube but not throwing up anything that he takes in by mouth. He has dropped 3 pounds in a matter of days and will not go to the bathroom on his own. We are going to Vanderbilt today at 3:15 for a GI study. They think that there is some form of a blockage that needs to be repaired OR he has outgrown the feeding tube and it needs to be taken out and sewn up. I am hoping for the latter of the two but I don't believe that is the solution. My momma gut tells me something is wrong. I will have more to post this evening when we know something.