when can my bitch get pregnant? she is on day 10 of her season and our dog got to her not sure how far he got!Can she get pregnant now?

Yes, she can! If this is not a planned mating, call the vet first thing tomorrow to find out when you should take her in for the "morning-after" injections.

The average bitch ovulates day 10 to 12, and the egs become feritlizable about 2 days after, staying this way for about another two days.

the sperm of a fit dog can live in the bitches tract around a week, therefore it is very likely your bitch would become pregnant unless you take remedial action as suggested.