I cant remember things

I am stressing out on all the stuff I have to do and I cant seem to catch up on all my work. This assignment is due today and I have only gotten half way done. It was confusing for me in the beginning and then it started to make sense. Once I felt good about the topic I was doing it seemed to be a little bit easier. But the problem I have is I over think stuff and thats what gets me all confused. Plus we have to at least find 5 sources and just looking for 5 sources is hard. All the sources I found are all saying the same thing. So I dont know which ones I should use.