I just got my car back from the shop having the head gaskets changed out. I went to start the car up the second time in 3 days and the engine is running with a high idle. Any suggestions .

 

Vacuum Leak, take it back to the shop. Could be as simple as a vacuum hose for cruise control, power brakes or emissions. Or as complicates as lower intake manofold gaskets. Take it back if you paid $$
FWIW hope the shop was aware that the head gaskets are different for each side, right and left are not the same.
Most places do not know this and overheating will occur if mixed up.