My husband & I are ttc. We had intercourse the day before the opk was positive & the day of. I am due to get my period August 27th or 28th. I took a First Response Early pregnancy test this a.m....... neg. I have symptoms of being pregnant. My questions are if I have enough hcg in my system to have symptoms shouldn't the test have been positive if were pregnant. Should I assume that I probably am not pregnant? Have any of you tested neg and then ended up actually being pregnant?