Give it another day or two, then call once more. If after that, she doesn't get back with you, hint, hint....move on.
There could be a lot of reasons and excuses) as to why she didn't get back sooner. Maybe she's also having doubts about herself/you; maybe she found you 'too good to be true'; she realized you're really a good man, but she hasn't really moved on from her bad break-up, etc.... A LOT of second-guessing.
Just give it time. Do not get stuck waiting for her reply. Go out and enjoy your time on your own or with friends, date more (wholesome, friendly dates).