Period is late 2-3 days

Sarah
I added the photo to better express myself. Basically my husband and i use the pull out method during my fertile area and sometimes just not have sex during all of those days. However, within two or so days of the fertile window ending, he finishes in me. I'm not showing any signs of my period coming except that I'm SO tired. Like i cant stay awake. And I've been bitchy lately. Thats all. Also, i took a test yesterday and it was negative. Thoughts? We aren't exactly trying for a baby at this time. However, it wouldnt be the end if we dod concieve. Our birth control method is basically just knowing my body and tracking my symptoms, ext.