Christina, has it been in this pot for the time you have had it?

If so, could be the change of conditions inside to outside. The leaf drop can be just changes to it's location. If the roots seem fine and Caudex. I would keep it warm, give lots of light and wait to see new growth commence, then give the terminal growth branch a pruning. If done when in growth, it will bounce back quicker.

Rick

Yes it's stayed in this pot the whole time. Last month I changed the soil and the roots looked great, the plant did well after, and the caudex is firm. I had a feeling the leaf drop was because of the abrupt weather changes and the odd watering that accompanied it but wanted to double check since Im still a newbie. My area basically went from winter to summer in a week!! Any recommendations on how much I should cut off that stem? Thanks for your help!!

After looking at the plant again. I would be tempted to cut the main branch quite short, just below the last large leaf. Making the cut on an angle, with the high side of the cut on the side opposite of the way it is leaning. Make sure that there is an old leaf scar just below the high side of cut.

I mention this, in hope that a new branch will grow off that side straightening the plant.

I would give the three lower branches a bit of a prune also. Only by an 1" - 1 1/2".

Rick

Thanks so much for your help Rick!!!