Personally, yes, I have, but only with someone I already knew well. It is so important to focus on yourself after a break-up, especially if you feel bad about it. Sometimes, if you parted ways on good terms, your “rebound period” might be quite short, and you can feel secure again quickly.
But most of the time, it is a good idea to take a few days or weeks – months if it was a long or very meaningful relationship – to learn from the relationship, and it is tricky to do that when you’re getting into a new romantic entanglement. For advice on how to find the right sort of relationship for you, take a look at GoMarry.