Hi there, I've had exactly the same thing happen to me... except I went originally because I suddenly became very short sighted in my left eye. I've been to the hospital several times and also had a CT scan of my brain which came back clear. The swollen optic nerve in itself is not a problem, but can be a sign of more serious things going on. Try not to worry though, OP, because 4 months (it's a long elimination process!!) after finding out about my swollen optic nerve, I've been given the all clear, and now just need glasses.