 [ Symptoms ] should dogs get flu shots some vet officers are posting get your dog his flu shots some will not even do surgery on the dogs unless they have a flu shot first do dogs really need flu shots [ Disease ] it is ok to start mid cycle but you are not protected from pregnancy until you have taken the pill for at least seven consecutive days it is also likely that the pills may change your cycle you should expect to get your period about three days after you finish the active pills in the pack in the meantime you may notice some breakthrough bleeding or spotting since you started right before your period was supposed to come talk to your gynecologist if you notice anything new or unusual