Bleeding during TWW post IVF embryo transfer

Bryony • TTC 3yrs +, 1 MC @12wks, 2 IUI, 3 rounds of IVF all unsuccessful, one biochemical pregnancy
A bit of a grim post I'm afraid but I just had some bleeding (a lot more than just spotting including small clot - sorry if TMI) and I'm 11dpet and wondered if this means a BFN?
 Anyone had bleeding in TWW on IVF round and still got a BFP
Looking for some positive vibes out there 🙄