Such a short AF, weird??

Hi There,

I just started using Glow, been TTC For about 9 months. My AF usually lasts a solid week with moderate to heavy bleeding. This month AF was 4 days late, and once it came I only bled for like 1.5-2.5days and was mostly spotting. I did a digital clear blue test on the 11th- was negative and broke it open like i saw on other posts and felt like I saw a faint line. So tonight, I bought 2 other brands that were not digital and they were both negative. I just don't understand why AF was so irregular/short this month, and IS THIS NORMAL? What do you think...