R1200RT,
never mind on the FedEx schedule. Took a look and the flight schedules to the PR have dramatically changed since I last flew down there so I know it wan't an option for you.
But, wanted to take a look at JBs fares, and I will admit that I in no way know what they were when you were checking into your options....but, let's assume you were flying from BQN to MCO and connecting to NW there. JBs fares for this weekend are 160$.
Still, some $$ out of your pocket, but not as much.
FYI-One way from MCO-MEM on NW this weekend is 130.
Maybe, with a little bit of research, you could have wound up with a guaranteed seat and avoided having BC tell you that you were wrong.