thank you for using healthcare magic,
well after starting o.c pills it is possible that your periods get irregular and might get delayed. after few cycle usually it becomes regular..
but since you have forgotten many pills in between and if you had unprotected sex in your fertile period then there are chances of pregnancy
i will suggest you to wait for few days and still if you do not get your period then take home pregnancy test or go for more confirmatory test like beta hcg
level in blood or ultrasound
next time take pill regularly and on same time.. if you fail to take pill take it as soon as you remember and use additional birth control method like condom..