It sounds like the window regulator may have broke. You have to be VERY VERY careful removing the door panel the RIGHT way or you will break plastic hook holding tabs off the door panel. It has been too long since I pulled one to tell you all of the procedure. You do take off the door lock button,remove the metal escutcheon around the door latch, remove the plastic cover inside the inside door handle and remove a screw, and remove the arm rest on the door panel. There are some door panel clips to pop back and the door panel has to remove by going straight up as that is where the plastic hook clips come into play.
Maybe someone else can add to the procedure.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.