How to use multiple copies of the same form combined in one file

I use a test pit form that has many fields.   When I am done with a project I want all of these forms say 2 to 10 depending on the project to be in the same pdf file.   I do not want to ge through each fiel and change each field to blahblah page 2 and then page 3 etc.   If i don't do this and combine they are all identical.   So I have been flatening.   This is an extremely irritating process that must have a work around.   flattening each page separately with a new name and then combining the files wastes so much time say bad things to my computer (that I would not want to repeat here).   There must be another way.

Of course I am using Acrobat Pro and probably in the wrong forum.   I can't wait to hear that.