Last month I started doing OPKS, I got 2 low, 9 high and then a positive ( clear blue digital), this month same time I've gotten 4 lows in a row. This time last month I had highs. I'm confused glow says I'm in my fertile week. And it was right last month, could my cycle change that much? I'm regular as far as AF goes. I'm so confused. I did randomly take a test like 2 weeks after my peak day out o habit, could I have confused the reader thing? Thank you for any insight