ElPolloDiablo said:Droopy leaves = Soggy feet.
The nursery that sold you the young tree watered it generously before the trip to your home. Maybe too generously.
The tree was probably not well insulated in its box and spent time on the road and/or in a warehouse at below comfort temperatures, thus exacerbating the issue.
And while well intentioned, your further watering made thing even worse.
What should you do now? Nothing but pray you have at least a fortnight of dry, warm weather to allow the roots to dry up.