This is once area that SW is highly slimy IMO. Unless you track and keep your confirmation # and amount, there is no way to see what travel funds you have. Serval other airlines have the travel bank as part of your online account, but not SW...they make it so that it is 100% on you to figure out and they make it intentionally difficult to figure out should you loose any of that information.
I love SW but this one thing for me makes them seem super deceptive in their procedures. They WANT you to forget. The fact that there is no tie in to your RR# is absurd.