Don't want to scare you, but better to know up front...
There is a small possibility that you have a blood clot. One of the symptoms of this is restless sleeping - there is reduced perfusion and the O2 lack to the area tends to keep you from sleeping.
There are a host of other causes - a reaction to one of the meds they have you on, an infection, early type II diabetes - the list goes on and on.
Most all are manageable, but the clot issue has real risks so I mention it first.
Fast recovery...