Hi, Am 39 Yrs Old, My Boyfriend Rub His Penis

Hi, am 39 yrs old, my boyfriend rub his penis in my vagina 3 days before my period the following month, I had my menstraution but on the second month I missed my period, I didnt visit doctor nor I test my urine, now im on the first week of the month and still no signs of monthly period, is it possible that I am pregnant?