When I forgot part of my my old password, I came up with a list of words that I possibly could have come up with and tried those. I eventually found it even if I was panicky the whole time. If I were you, I would list the words and try them in the order of probabilities.
Un/Fortunately, BW is implemented to rate-limit password brute-forcing. I feel you about your CAPTCHA hell, and I hate their surreal sunflower CAPTCHA (maybe to make it as repulsive as possible to the hackers?).