Okay girls I REALLY need help. PLEASE READ!!

So, I was going to go for a non hormonal iud but my dr kept running me around and around and still haven’t gotten my prescription in (it’s been over 3 months). So I just went with the mini pill. I only took 1. Just one day of it, And i stopped bc I was reading side effects and peoples stories and just decided to play it safe until I can get the iud. So today, I am bleeding. Bad. Like a period. My period isn’t due for 11 days and I am never early. If anything sometimes I’m late but my periods are pretty regular. It’s scaring me bc I have no clue what this is. I took the one pill Sunday. I am sexually active and we pull out. Please help 😕