changed plugs, wires, and ingnition coils,now has roug hidle

hello i recently had to replace my ignition coils on my 2003 buick rendezvous milage 54,230 while i was doing this i figured i might as well change the plugs and wires too. well i got everything put back together right and now the car run like crap it has a rough idle that gets even rougher when you put the car in gear and when i go to stop the car sounds like it wants to die but doesn't acceleration also seems to be affected it just doesn't have the get up and go that it used to. does anybody have any idea what might have gone wrong here. thanks in advance to anyone who can help.