is there still a chance or not really?

Hi I’m alittle ify on my situation. I was on the birth control Kariva and I take it really irregularly. I missed Saturday’s and Sunday’s pill and that was just three days before I ovulated and I had unprotected sex with my boyfriend. He didn’t ejaculate in me but there was pre cum. Is there a chance I could still get pregnant? We are hoping that I am so it would be great if there is still a chance. Hope someone can help.