I am 33 Its been 10 years since I had any sexual relations with a man, the last time I did I conceived my soon to be 9 year old son. I had sex with my future husband 3 times during the estimated fertile period according to my chart, my last MP was June 7th, my breasts have become fuller veins are more prominent, areola/nipple is darker/swollen, been going to bathroom more throughout the day, constant abdominal pressure/achy cramps this past weekend AF was Due July 5th, July 7th I had pink staining when I wiped and on my underwear the once, then nothing for another day then a couple more drops of blood on a pad. Neg htp test as well as Doctor Urine test. Is it possible that sex has thrown my hormones off for a month or that I may be pregnant and its not detectable yet?