Pregnant???

I had unprotected sex with my bf a day after my period ended, we usually use protection but we didn't this time, he did pull out but I was scared of precum so I took a take action pill 2 days later My cycle is usually 35 days long. I skipped a period and this month it came but it was a little bit lighter -my period is usually very heavy and I have to use the overnight pads but this time I used just normal sized pads. Is this normal?? Could I be pregnant??