This is my third time coming back

My name is Patty, first time I was here was after m/c at 10 weeks. Got pg, now we are trying for a second, was here for a while, left because we stopped TTC and now I am back again. I don't think any of you will remember me, but I am back and I have a question, well need advice.
So my cycles for the last 9 months, have been 26 days, I spot for 3 days and on the 4th AF is here. My last cycle, I started spotting when AF was suppose to come, but on the 4th day of spotting she came. Now this cycle, I O 3 days earlier, Af was suppose to come on the 1st, not here yet. I had my 3 days of spotting, and since yesterday there is almost no spotting and keep getting BFNs. Any ideas?