My cycle was due on July 9th, on July 5th we did not use birth control. On July 12th (1 week after intercourse) I felt like my period was coming but there was only the lightest streak of blood on the tissue. That happened again on the 15th but only the lightest streak of brown. My cycle did start the 19th but was very light. However in August 15th I had a regular period. However, I gave had bouts of nausea, my breasts have been hurting a lot, one actually grew bigger than the other! My nipples are dark and arreolas have gotten bigger, plus lots of big blue veins, I also had 3 weeks of crazy high libido. I've had a lotof stretching in my lower abdomen and now it's feeling congested and hard a little bit, especialy when I lay on my stomach. I have a lot of cervical mucus. Is it even possible to get pregnant at 48 AND have negative HPT and a regular cycle? test dates July 31st, Aug 1st, Aug 10th and AUg. 17th.