Would I be pregnant?

I had my period on April 19, had sex with my BF on April 28, 29. When I calculate my O, some says it's today, some says it was yesterday. Would I be pregnant? Next period will be on May 18, finger cross. I have a 2 years old boy, my BF always tells me that he's not ready for another baby, but he never use condom and I am not on any contraceptive form. Every time I ask him to use condom, his response is always" are you sick lol?"