Hi ladies - just joined the forum today but have been lurking for weeks. I think I'm 13 DPO today (just going by my period tracker app) and tested this morning and got two BFN.

The thing I don't understand is that I had what I thought was implantation bleeding (so scant - barely noticeable) 5 days ago and have had nothing since. My period is supposed to start tomorrow but usually I'd have spotting for two days leading up to it. Nothing so far. The only other symptoms I've had is sleepiness (I napped the last two days) and some vivid dreams, but that could be attributed to anything I guess.

We BD'd every day during my fertile window and grabbed some "outliers" on each side and used preseed. Think there's a chance I might still get a positive result? I used first response so I'm kind of thinking we missed it this month.

I also used a period tracker on my phone which was almost always spot on with when I'd get my period. It wasn't until Feb, when I conceived on my first cycle of trying, that I realized I may ovulate early and have a longer luteal phase. My cycles are always pretty spot on at 27-28 days and my app on my phone has the 5 most fertile days around the 12-16th day of the cycle. It's probably assuming I O on the 14th day of the cycle like most docs and apps do. Except... this was the first month I was taking OPKs starting on CD11 and I never tested positive. The lines were no where near as dark as the control line.

I ended up preggo that cycle! The apps are useful for estimating AF but not good at tracking ovulation, which is the most important part about TTC. I think I O'd on CD10 or CD11, which means my most fertile days were not what the app told me.

I'm very lucky to land pregnant on my first try but if I could go back, I'd definitely make sure I was charting my BBT starting the first day of my period so that I can see definitely when I O'd. That information would help me if I had to go on to another TTC cycle.