Is it possible

So last month I had unprotected sex on the second to last day of ovulation and then two weeks later I had a “period” it only lasted 3 days. Two of which were heavy and the last was light to none. Then this month I started my “period” and it was heavy the first two days now it’s starting to get light on the 3rd day. Is it possible that I’m pregnant and yes I know I need to test