Pregnancy/iPill effects? Pregnancy?

Took an ipill 3 hours after unprotected sex on the 14th day of my cycle (fertile period), had unprotected sex again (with no ejaculation inside, only precum) approximately 71 hours after taking the pill. 7 days after the first act of intercourse I got spotting and light bleeding. Been experiencing fatigue and abdominal cramps for over 3 weeks now since taking the ipill. Getting nausea, frequent urination, strong headaches, with slight dizziness still. Mood swings and PMS symptoms. Sometimes I can smell period blood but there is no bleeding at all. Sense of smell has heightened. I feel excessively cold sometimes. My period was due on 6th December but I still haven't gotten it on 12th December. No unusual food cravings. I've taken 3 pregnancy tests but I probably took them too soon- they were all negative. I'm wondering if my age (18) impacts all of this in any manner. Took ipill 4 months ago and that time I got withdrawal bleeding in 3 days which was heavy and lasted 2 days. Pregnancy?