I hate to be the one to say this, but she's probably lying and saying all this "oh it's too soon" crap as a polite way of giving you the brush off. Sorry, but that's my reading of the situation based on your post alone.
I'm afraid this was my reading of the situation as well. When you say she told you it was "too soon after another relationship", do you mean she was dumped? If so, she still probably wants her former boyfriend.