Period's on time, but not as heavy, could I be pregnant?

My boyfriend and I got a little intimate on June 8th and June 29th, he never penetrated, I am still a virgin, but he rubbed against my vaginal opening. My period started on June 2nd and ended on June 8th and has started today, July 1st, as expected, but with less than normal bleeding. It's usually heavy bleeding but today it's lighter today. I have been worried about being pregnant, could I be?