Try asking her if she feels up to a relationship. If she says no, then you should definitely wait at least a couple months, both to avoid re-opening that wound and to prevent people from referring to your relationship as "sloppy seconds."
Give her some space, some time. Break ups are NEVER easy and usually after one girls are pretty emotional. Also, they are not going to be very fund of guys aha. Just wait until you can see that she is calmer and back to her usual self. Probably a week or so.. Good Luck :)