Hubby and I had sex throughout the fertile window but stopped 3 days before ovulation due to a unexpected trip , I got my period 28th aug which stopped 1st sept. But wasn't heavy, every time I went to pee there was very little blood in the toilet bowl . Now feeling sore breats , headaches , more tired then usual and cramps in the middle of my lower abdomen , and lower back pain Any possible way I could be pregnant ?