I had a really light af about a day or 2 late this cycle. It was basically 3 days of spotting. I assumed it was my af so i carried on as usual. I've been feeling tired and under the weather, nauseated on and off and have had loose stool alot the couple days so i picked up a dollar store cheapie. And I swear i see a line, wouldn't the line be much darker by now if it were positive??