My last period was the 12th-17th of October. I had unprotected sex on the 22nd. It is now the 5th of November and for the past week I have been very tired, light headed, breasts a little bit tender and for the past 2 days sore lower back and tightening/cramps in my lower abdomen. Took a pregnancy test today and it came back negative. Did I test to early? Unsure as I have never had a child or been pregnant. Am I pregnant and maybe tested to early?