No period

Me && my significant other have been having unprotected sex && he's been Using the pull out method. I'm not taking any BC. My last period was Sep. 8th && haven't gotten it yet this month. I'm 9 days late. I've beeb having lower abdominal cramps && really bad headaches && a heavy feeling in my lower abdominal area. I feel exhausted && dizzy. What should I do? Don't have any kids.