It still don't get why you'd want to inflict 30 days of pain on a teenager who, for whatever reason, used a pill as a last resort to avoid the possibility of eventually needing an abortion. Do you think a pill like that would be used much? How would your plan help reduce the number of abortions performed?
"...for whatever reason.."?

Don't play obtuse. Headaches, queasy stomach, random vomiting.. Hardly anything that's going to cause death, but damn well makes them think about what they're doing next time.. Hell, it'll be just like morning sickness, only without the resulting life form. If that ain't enough of a wakeup call that you're playing an adult game, then I don't know what is.
Simply put, if you want to play like an adult, then act like an adult.