Engine Performance problem
2004 Honda Accord 4 cyl Two Wheel Drive Automatic 75,00 miles

i have a 2004 crv.it has 75,00 miles.i have never done a major tune up on it.my car lost its pwer in a matter of weeks.it was a drastic change of power on a such a short time.My pedal is not as stiff and i feel im forcing the car to second gear?and my car also shakes when it idles.i guess my question is,does all this means i need to change my spark plugs and wires?someone told me that my car could have dropped a cylinder thats why i get no power?no to long ago my car would react on contact to my pedal but now i floor my pedal and it takes a while for the car to react to the gas im giving it. what could it be?