A week ago today, I began having extreme lower back pain ... feeling like my lower back is being pried open. The pain is still present, but not as extreme as day one. My thinking was, maybe I am experienceing this pain because AF is suppose to visit me this week, even though I have never experienced lower back pain prior to AF arriving. Anyhow, AF was suppose to make her appearance yesterday, but I have only been spotting -- and very little. This morning, I got an alert from Glow stating that I am 2 days late, despite me recording the spotting. I thought I was pretty in-tune with my body; I mean, I feel the symptoms as if AF is going to arrive, but now I don't know. Should I test or wait a couple days more? Your thoughts are greatly appreciated. Oh, I forgot to mention that I used PreSeed for this the first time this cycle TTC.