I've taken the morning after pill but I'm not sure that it would be suitable for you.

The notion is that you take it as soon as possible after having unprotected sex. It isn't very good for your body, though, so it can't be relied on as an ongoing form of birth control. It is more for once off problems like rape or a condom that broke or something like that.

I would say that the safest option would be to keep taking the pill and to use condoms as well. Maven is right that the withdrawal method isn't terribly effective with respect to preventing pregnancies.