Possibly pregnant?

My husband and I just got married and now we're trying for a baby. My period isn't usually the same time each month. Like in April, it was April 7, ended April 13, in May, it was the 5 and ended the 12, in June, it was the 6 and ended the 14, and July, it was the 13 and ended the 19, but I think it was later in July because that's when we got married. But we recently started having unprotected sex and still no period. I'm getting anxious waiting any longer 😁 ?! Should I take a pregnancy test? I am having cramps and what not and still no sign of period. This is our first time trying, so I'm hoping for the best