I got a message from my Doctor this evening and my MRI came back NEGATIVE!!! So it looks like there was not a tumor at all which is wonderful news! Sometime next week I hope to be able to get in touch with the endocrinologist to see how we proceed. Looks like I will be able to nurse for a while yet though which is just wonderful news. Not that he wouldn't do just fine on formula, I just enjoy it so much it would be hard for me to have to stop now.