
A season will progress as normal whether a bitch is mated or not. so if your bitch normally bleeds throughout her season then she will continue to do so.
Now I hope you take the following as impartial/impersonal advice/information not just aimed at yourself but for anyone else reading this forum when searching on the subject:I would advise you buy 'The book of the bitch' as I do feel you are very ill prepared for breeding from your bitch, especially in a toy breed where problems are more likely, and you need to recognise if your bitch is in difficulties as otherwise you could end up loosing her.
If your aim is not to become seriously involved in your breed (found a breeding line, with the aims of improvement/maintaining standards), then breeding from your bitch is not a good idea at all.
Unless you would consider stopping the potential pregnancy (an Alizin injection can be given up to 6 weeks after mating) I would advise you to join the breed club, find a breeder of toy breeds to act as your mentor and adviser for the forthcoming litter, someone that will actually stay with you throughout the whelping, will know if and when the vet is needed (few vets have breeding experience outside of C sections), and will help advise correct rearing.
Remember that with such tiny breed they are prone to Hypoglycemia, so need frequent meals (probably 6 per day) and should not be homed until about 12 weeks. Also many toy breeds are not great mothers and you may have to do most of the rearing yourself, this might include hand rearing feeding two hourly around the clock.
Are you still in touch with your bitches breeder, have you researched what sort of whelping the mothers lines have had, (C section/natural/problematic), did all their puppies survive/thrive, where any born with cleft palates/deformities, were they good mothers. Often such traits are strongly inherited.