Is it possible to get pregnant on my 44th day?

Patient: I am 18 yrs old. I had my first unprotected sex with my bf on my 44th day. I have irregular periods, ranging from 30 days to 53 days, so I can’t exactly pinpoint my ovulation period. Its now my 44th day and still have not gotten my period (and I’m 100% sure I have not had sex before) And now, we just had unprotected sex using withdrawal method and he said pulled out in time. Can I possibly get pregnant from this? And I am not under stress lately. My period just began to be irregular these past few months. Thanks!

Doctor: