Kathy ~
I'm sorry to learn of a possible tumor re-growth, which is not that common but when it happens to you, can seem devastating. Even with the best intentions, due to the narrow operating area and other factors, surgeons can rarely remove every scintilla of tumor and, unfortunately, re-growth can occur. I hope it hasn't in your case but only another MRI in six months will determine that to a medical certainty.
I would try not to stress too much until you have a definitive answer to the question of re-growth. I know, easy for me to say, but necessary unless you want to allow a 'what-if?' to dominate the next six months of your life. I know you won't allow that to happen but your disappointment with the possibility that some residual tumor has re-grown is perfectly understandable.
I'm sure many prayers will be said for you, Kathy....especially as your next MRI scan date approaches (in August). Mine will be among them.
Jim