Okay so sometimes my periods are a little irregular but I am currently on day 35 of my cycle and still no period or any signs that it is coming. I had unprotected sex around the 10th of this month (not sure of the exact day). The first day of my last period was June 21. I took a HPT yesterday with negative results. The only real pregnancy symptoms I have been experiencing are fatigue, mild lower back spasms, and very mild cramping in my lower abdomen. Is it possible i may still be pregnant? When should I try testing again?