Peggy it is a tender plant. This late in the season it will die if the temps go down into the 40s and stay there.
What you need to do now is cut it in half stick the part you cut in some water or moist soil and it will root. The plant in the pot will branch. But as I said it will not survive outside much longer in our climate.
At this point you have to decide if you want to bring it inside for the winter or leave it outside to die.
