I would suspect you have drain on the battery. One of the circuits is "leaking." Take an ammeter between the fuse posts (remove the fuses) on the continuous live circuits and see if any are showing an amp draw. The only one that draws any current that I know of is the clock. You could simply check the glove box light, door and tailgate light switches, trunk and hood lights. You mentioned your power windows don't work. It may be from dirty switches. The power door lock switch in the driver's door may be sticking and should be cleaned/greased (dialectric grease should be used.) The door lock switch is located on/around the lock assembly inside the door. If worn, replace. If the door lock switch was stuck in the activate mode, the door lock motors may be damaged/burned out.