Pregnancy

So my period never came in the month of january and at first it was because i was stressed. on the 22nd on january i had unprotected sex using the pull out method and my period tracker told me i was supposed to start my period january 31st through february 2nd and i haven’t started it yet. the 22nd was either one of my very fertile days or a day or two after my ovulation days. on january 28th i started spotting and it stopped on thursday and i’ve NEVER spotted in my entire life. could i be pregnant??