how can I check , screen and see all the changes that I have made tothe plugin or others plugins? if I changed some vanilla stuff stats etc how do I know and how can I go look for the single changes made?

You can view a plugin with FO3Edit by placing it in a Fallout 3 directory. That's how I do it, anyway. You can also use the CK's Data > Details window to see all that's in your mod, but with no "funky colors" or other visual indication of what they change (if anything).