I'm so sorry to hear this news <img src="i/expressions/face-icon-small-sad.gif" border="0"> Going back after only being out for a little while can be such a head game. Coughing up blood makes the ordeal that much more unpleasant and scary.
I'll be praying that the doctors find the underlying cause of the bleed and your exhaustion. I hope it is something that can be fixed without too much complication.
Hang in there, sweetness, and please keep us posted.