Hi everyone. Hope I'm posting this in the right place!

Been TTC since May and each month had a cycle of between 26-29 days. Last period was 19th September so the ap said AF was due on 16th October. However since the 14th, I've had on and off brown blood only when I wipe (sorry for the TMI!), sometimes only just a little and then others a bit heavier but not period blood if that makes sense. I did a test on the 16th and got a BFN but just wondering if anyone else experienced this sort of bleeding? I have been googling but that's just a head screw up ha ha! I would very much appreciate any advice from anyone. Just wish if it was AF it would just happen as I'm clinging onto any shred of hope 😂 thankyou xx