Could Missing Periods And Twinges In Ovary Be Due To Pregnancy?

My menstrual cycle ranges from 28 days to 30 days. For this cycle, I am now on cycle day 34 and still no period. I had period like cramps a few days ago and expected it to come, but it's still not here and the cramps are gone. I also had twinges in my right ovary yesterday that lasted about 10-15 minutes. Could I be pregnant? I'm not on birth control. My husband and I did have unprotected sex around the time I was ovulating, but he always pulls out and it's worked for us for 4 years now.