Feeling discouraged..!

So I had 2 days of very pink spotting 3 days before AF was due. like only light pink blood every 4 hours! So I’m assuming it was implantation bleeding! I had the same with my first daughter. But I am now 8 days past my missed period and STILL getting negative tests.. im SO tired, moody, my back hurts, and my apatite Is all over the place. Like Nothing sounds appealing one second and the next I want to eat everything lol. SO my question is how long before you ladies got your BFP?! Praying mine is coming.. 🙌