I'm on birth control (junel) and once you start taking the brown pills at the end of the pack you are supposed to start your period. Welll I missed a few days of taking the brown pills and I had unprotected sex and he came inside me but, and this may sound stupid but I went to the bathroom afterwards and most of it came out (no pun intended) and sorry for tmi I'm just trying tobe as exact as I can but yea does that mean pregnancy could be possible or slim chance?

Generally you are still considered protected while in the brown pills. These are only there to keep you following the pattern of taking your pills on a regular schedule. Missing one or two of these won't effect your protection. Missing the other pills can.

Of course even birth control pills are not 100% effective, and some people prefer to also use an additional form of protection along with them to lessen the chance of unplanned pregnancy even more. Pregnancy will always be a possibility, but most women use the pill on their own.

Keep in mind that even though it may seem as if most of the semen comes out, plenty remains inside. Something to remember if you ever do stop using birth control.