I don't know the exact day of my last cycle, I think I ended around the 26th ish of June, had sex with my ex a day or so later, then got back with the guy I'm with now on the 5th. My periods are about 7 to 8 days long. I took 2 pregnancy tests last night, and one this morning, There is a second line, but it's extremely light! All of the research I have done online is saying my conception date should have been around July 11th, and with the lines being so light I can't have that much of the pregnancy hormone in my body. If it was my ex's I would be almost a month along, so that line would be bright wouldn't it?!

HELP!