What was wrong with my eye?

After I had reached my room, I saw that my right eye became red at the white area (redundant). What was going on with me? I was so nervous. I asked my friend who is a doctor; she told me not to worry and that it was going to be okay become normal. My right eye was diagnosed with subconjunctiva hemorrhage. She adviced me to take a some rest and do not to irritate the eye. That was the good news for me. How so much lucky I am!