Missed pill 4 row

If do you have experience about birth control pill. I just unexpectedly about birth control just mess up of my cycle twice time. Let you know I am deaf. If you don’t understand what I mean. I am started take pills on April 29 to may 6. I am expected my period will showed up. I don’t feel cramp. It’s just light for three or four days. After I had sex with my relationship used unprotected on may 22,26,and 27. I getting confuse why I got spotted on may 27 and 29. Can you understand