SOMEONE HELP ME PLEASE!!!!!!!!!!

My name is Jenifer I’m 17 years old. I need help!!!! My period started September 8 and ended the 12, I had sex September 23 without condom. Today is September 25, and I’m bleeding a little bit, like a light red. This app saids that the day i had sex i had a 11% chance getting pregnant, I’m really scared someone help me. I know i was irresponsible for not using protection but I’m really scared