Vcarmon. Note - in your settings, add your location and Zone. It helps us cause we are located all across the globe. Some of us in similar locations/zones to you will be better able to assist - in general.
I agree with what Tarev said. You might try rooting some of the leaves. When I have had Jades and do their leaf drop thing, I have been surprised that they can and do recover.
From the looks and what I can see, the plant looks pretty good. Whan you said " A bunch of leaves fell off today " had you moved the plant? Brought it inside? Something else that might have induced Stress?