Hi Angrawa -
Sorry to be so slow with a reply. Have you made a decision?
I would personally probably wait a year and re-apply. I have a good friend who did not get in to any of her top choices her first year. This year, she was accepted at 5/6 schools. She really improved her GRE score, though. So, I guess it depends on whether there is something concrete you can work on during the next year.
I haven't heard about people transferring, but that doesn't mean it doesn't happen.
Good luck to you -