Hi Glenda,
German ivy (Senecio mikanioides) can stay outside until night temps drop below 40 degrees and actually likes the cool fall temperatures. Bring it inside before any frost arrives. Keep it on a bright north or east windowsill during the winter and allow the soil to dry out more than in summer.
Overwatering is the only real problem with this
plant. I suspect that the repotting is what is behind its current decline. If it was losing leaves before you repotted, it was probably because it needed to be watreed more frequently, not because it needed a larger pot.
Prune it back when you bring it inside to help it adjust to the indoor environment. Do not repot or use fertilizer during the winter. Spider mites can be a problem with German ivy and so can aphids. Be vigilant and treat any critters as soon as they appear.