How do I combine three documents, without screwing them all up?

Technically this is helping me with my homework, but I did all the work already and now I need help :(
I didn’t know it had to be all in one document, and I made three. Two Word documents, and one Publisher.
I keep trying to add a blank page, and cut and paste the Word documents together but it gets all screwy. And I rarely use Publisher, so I don’t even know where to begin with that.
How can I combine these three documents?
Is it wrong that I want to link the documents so someone can do this for me? :(