Scared

Girls, I am very scared. It was my first time taking the day after pill on Jan 9th and my period is irregular so I don't even know if I'm late. I'm scared I can be pregnant. I took the pill 19 hrs after sex though but I feel very stressed, anxious and worried about it. I cry and pray every night. I guess it was safe because the guy didn't come inside me and he also pulled out on time. I've been having PMS the whole time after the pill and 2 days ago I saw 2 blood dots but my period didn't come. My vagina just kind of smells like antibiotics and I'm starting to have dhiarrea... Help! I'm so scared. Everybody says I'm fine, but if I keep worrying I'll take more time for my period to come. I'm scared to take a pregnancy test too.