If your password is unique to BA I suggest you run a virus scan on your computer and maybe even on your phone. Might indeed have a keylogger.
This reminds me of the time, I got a knock on my door, and my landlord asked me to help her son with his computer.
When I went downstairs to check the computer, I see her son packing and saying he was moving to Mexico.
When I asked why he showed me his computer. On the screen was a webcam still of him with a finger in his nose a can of mountain dew in one hand and headphones on with 1 hell of a scared look.
Under it was the wording "we caught you, we will report you to the FBI you have been looking at illegal pornography if you don't want us to report you to the FBI pay us 400 dollars via prepaid gift card"