period but possibly pregnant!

Ok my periods were never normal but for the last 3 months they have been right on time according to this app well this month I had had unprotected sex and my period was 16 days late. I didn't think anything of it because he pulled out well about 11 days ago he did not pull out on the day it said I was ovulating. Well we done it 2 more times and he did not pull out. And I still didn't start until today and it's very heavy and full of blood clots. So Is there anyway that I'm having my period so the process of making a baby can be done?