Implantation bleeding?


Ok so long story short, I'm 36 have been trying with my hubby for 6 years. Iv been through everything except <a href="">IUI</a> and <a href="">IVF</a> (those are next) I had a Hsg last month (tubes clear) Dr. Switched me to Femara this month. I responded extremely well, my lining was the best shes seen. I have PCOS, Hypothyroidism, insulin resistance I'm on 2000mg metformin and 2 dpo I start progesterone for 2 weeks. I have never been pregnant and have never experienced this during my TWW or ever for that matter. 7DPO I woke up to a wet feeling almost like fertile cervical mucus. I went to the bathroom and it was a very dark brown discharge. One wipe it was gone and haven't seen it again. I'm still 7 days away from period. And I usually get it the day after I stop progesterone. I know everyone doesn't get "implantation bleeding " and I dont want to get excited but I literally started crying wen I saw it cuz that is what my mind went straight to. So did anyone experience IB before getting their BFP.