help with rabbits

Question
i have 3 rabbits 2 females & 1 male. I keep 1 female and the male together the fist day i brought her they had sex how do i tell if shes pregnant and also they are all indoor bunnies they have never been outside before only when i was bring them back from the shop the pet shop said i don't need to bring them to see a vet because they are indoor bunny is that true please help me !

Answer
hi  andrea-if you think she is pregnant she must be on her own as the buck will kill any babies that are born.
she will become grumpy and maybe try to bite this is a good pregnancy sign
dont worry about indoor bunnys they all like to go outside sometime.
dave.