I Don't Know If I'm Pregnant Or Not Since I

I don't know if I'm pregnant or not since I had sex but he didn't cum because the sex was cut halfway. But, I missed my period and I'm freaking out. I do have irregular period. I did home pregnancy test, keeping my urine in a bottle for 3 hours and I found a white (almost transparent) flaky thing floating in my urine. Am I pregnant?