When should I have got my BFP?

Sept. 26th, maybe a few days on either side. Ovulation really has no bearing on how well your cycles are timed. My friend ovulated on the 24th day of her cycle, roundabout, because she had married her husband but not moved out with him on base until a few months later, he shipped off a week after she got there, and she started her cycle the day she got there and had it for a week. We don't even ovulate for sure every month, some women only do so every other month. It's all tied together hormonally, but the average is what is cited in medical literature.