Want to have hot sex this weekend and my cycle has started. How do I stop it?
You cant at this point. It takes a few days for hormones to kick in and get high enough to stop your period. Also I dont know if a doctor will give you that concentration of birth control if there's not a good reason (no, hot sex is not a good reason). But you may want to consider birth control if you're having sex anyways and you want a way to regulate your cycle.
You cannot stop your cycle. But for future reference, birth control pills help regulate your period.
you cant once it has started
