Seriously scared

So me and my boyfriend had unprotected sex near the end of last month, I took a morning after pill. 5 days later we had sex with a condom and it split- i went to the doctors and they gave me two levonelle to take there. My period is officially 7 days late, I have all the period pains but no sign of blood. I know the emergency morning after pill can mess up your cycle but I'm scared. I took a pregnancy test 4 days after when my period was meant to start and it came back negative. My boobs kill- but I keep getting really thick white discharge during sex and in my pants. Im scared this is something abnormal. I dont want to be pregnant. What could this be? What is your experience? Have you ever taken 3 morning after pills in 1 cycle?