Day 50 of Cycle 😲

Hello ladies, Cycle day 50 here. My husband and I are TTC and have been for several months. I experienced some very light pink mucusy discharge on day 29 of my cycle. I thought my peirod was starting, however it lasted less than 24 hours and was such a small amount that I barely noticed it. I was hoping it was implantation bleeding, but I took a pregnancy test at days 33 and 43 of my cycle, and both were negative. Now I'm on cycle day 50 and I still have not had my period or a positive test. Although I want a BFP, I'm starting to lose hope for it this time around since I keep getting BFN. Anyone else experience this? What's the latest day that someone has gotten a BFP in their cycle?