I am a 23 years old with a some what irregular cycle, it ranges from 29-31 days (Never any later then 31). I am not trying so I am not calculating my ovulation or anything like that. My LMP was on March 14th, and according to what I'm reading it says I was most fertile from March 28th-April 2nd. My boyfriend and I had been very sexually active around that time (26, 27, 29, 30, 1, 2, 3) and throughout the month. On April 3rd and 4th I had some brownish discharge only when i wiped, which i heard could be implantation bleeding. I have had the following symptoms: Nausea, Bloating, Gas, Heartburn, Fatigue, Head Ache, major appetite, and minor cramps (sorta like premenstrual). I am so confused because I took a test (First Response Early Detection) on the 15 and 2 today the 17 and both are negative. I did read that if you ovulate late it can take longer to detect pregnancy by HPT....then others say I should test + by now if i am. PLEASE SOMEONE TELL ME WHAT YOU THINK?!?! Any comments would be greatly appreciated. Thanks!!!! :)