I missed my mini pill and had unprotected sex the same day. the day after i realized and took both pills together. i havent experienced any bleeding like i normally do if i miss a pill. should i be concerned?

Any oral contraceptive is less likely to be effective if it is not taken on a regular schedule and if pills are skipped. If it was likely to be your fertile time, your chances go up even more. If your period is late, you should check a home pregnancy test. If this happens frequently, you might consider a form of contraception which does not require a daily pill. Good luck.