So I had sex once about 3 or 4 days my period on sept. 17th and then again afterwards while I was ovulating and again it was once and about 4 days after on the 30th of sept I got really light pinkish bleeding and I thought it would be my period but it came and went for 2 days and then just had spotting for the next 2 or 3 days. I had almost every pregnancy symptom you can think of for about the next 2 weeks after that then it all stopped. I took a pregnancy test the first to second week of this month and it came up negative, and now my period was due on the 13th and it always comes on regular basis at mid month might be a day early or a day late but always there, but now its the 20th and still nothing, I was wondering if its too soon or if its good time for another pregnancy test? And what do you think, could I be pregnant?