The vulva can take a while to return to normal, sometimes Ashas does not reduce to normal for another 30 days or more because she tends to run through mild false pregnancy. Once out of heat, you dog will not be receptive to dogs even if it's still swollen. And remember, there are usually only a few days in the entire period that they are receptive/able to conceive and if her first day of bleeding was July 1, that should be well past her now.