My rabbits stopped breeding,is she pregnant?

I tried breeding my doe(Lucy) with my buck(Stormy).They mated when I put them in the same cage.but now i haven't notice them doing it anymore. I kept them in the same cage for a while and then I read something about them not supposed to be in the same cage after they mate the first time?(and yes i know they aren't supposed to be in the same cage with her kits). Also i haven't noticed Lucy being aggressive (I hear they sometimes act aggressive when they are pregnant). I felt her abdomen for babies but i haven't felt anything. Any ideas on whats up with them?