Homogenised is when they mix it so that the cream and milk don't seperate. If they don't do that the cream rises to the top and seperates from the milk (that's what skim milk is).
Pasteurised is when they raise the temprature really fast to kill germs. That's the important one because unpasteurised milk might have nasties in it.
Soooo, I don't think you need worry.