having late periods.

Kilee
Okay for a quick brief. I'm 16. Not a Virgin recently. And currently in the flooded parts of Louisiana. 
So well my last period was 21 days late before it started. It was 11 days late when I lost my virginity without a condom. Bring me I stressed about it and then 12 days later my period started. Well now I'm 9 days late. I've had sex twice in between my last period and today. Well he never came in or around my areas down there. And I actually have been really stressed lately with my house being nearly flooded and all. And I looked up that Precum has only really dead Sperm or no sperm. 
So should I really be worried if I'm pregnant or not? I need some reassurance so I can finally relax and get my BF to relax too.