So. Before the form of hormonal contraception currently known as the Pill, there were a bunch of herbal, chemical, and mechanical options for contraception. They fall into three general categories: barriers, measures that make the vagina and uterus inhospitable to sperm and thus prevent conception, and measures that make the uterus resistant to implanting and thus prevent gestation. (Yes, the morning-after pill is not a new idea; it is, in fact, a really, really old one.)
There is also the good old fallback of lactation, since lactation suppresses the menstrual cycle. But that only works when there's already a kid. So if you're a writer and thinking about "how to get my characters birth control", well that's more toward the family-planning end of things.
The thing is, every single one of the pre-modern methods are limited use approaches. They are used just before or after coitus. They may, in the case of something like pennyroyal, be used regularly once a month to ensure menstruation, but only for a few days. Half these options are "make a paste of these two or three things and dab it inside before you go for it". The other half tend strongly toward "take X much of this substance in the morning". (In a few of the second case, one also prays that it's enough to kill a blastocyst without killing oneself; it's really amazing how many places thought ingesting mercury for one purpose or other was a good idea.)
You wouldn't think this needs to be said, but apparently it does for some writers: this is the exact opposite of the Pill. There is no pre-modern form of birth control I have ever come across that is taken daily. That is an approach used with a medication whose effectiveness relies on constantly adding small doses of hormones which are not being natively produced. There is no herbal Pill, okay?
( Of course, this leaves me with the question of what ninjas are using. )