Help, what is going on!?

Jessica
Hi all!
Been TTC for three months. I stopped BC about 5-6 months ago after being on it for a very long time, my cycles have been very long ever since, about 46 days. My last fertile  window according to glow was May 5th-11th, we had sex every 2-3 days the month of May. According to Glow I was to get AF on May 25th but had nothing until very dark brown bleeding on the 27th-29th mixed with just a tiny amount of red. It was much lighter than my typical period which is very heavy and about 5-6 days in length. Never had such a short or light period if that's what it is. I have cysts on my ovaries but the doc doesn't think it's PCOS necessarily, I don't fit the bill for anything else PCOS. Been spitting a tiny bit, mostly brown when I wipe. Thought implantation bleeding but took a pregnancy test first thing this morning and it was BFN. 😩 Don't really have many symptoms other than nausea here and there and I'm starving all the time. Had lots of blue veins on my chest and shoulders last night but not that noticeable this morning. What is going on?????