If you've been paying off your mortgage aggressively, does that mean you've been paying more than your required minimum principal and interest payment?

First, call your bank and ask them what your minimum payment must be. Next, ask them what your CONTRACTUAL AMORTIZATION is. Just because you have 15 years left on your mortgage at the current payment you are making, it does not necessarily mean that you are under obligation to continue paying it off that aggressively. Honestly, it may be as easy as someone moving your payment back down to what is required to go back to your original amortization. Not as big a deal as you might think!