Challenge this week

The challenge I am have this week is getting all my grading done. I have a stack of written journal articles to grade (required by the county to incorporate reading and writing in all content areas), quizzes for medical terminology and abbreviation, summative unit tests, and many miscellaneous worksheets students have filled out that go along with watching videos, to charting vital signs, to writing descriptions of wound beds, etc. I feel that if I don't have a product required to be turned in by the student then they will not work. Also, truly, I am worried that if I have nothing to show that proves I used various methods to get the knowledge to the students then I will be found at fault for poor grades. I know that everything does not need to be graded but I am having a hard time deciding what should given a grade out of all that work. In our grade book we have three categories: formative (25% weighted), summative (60% weighted), and informal (no weight). I never actually enter anything in under informal because I am so backlogged by putting formative and summative in. I am wondering, though, if I should be entering informal assignments and then the questions is how do I evaluate those. I feel I spend my time wisely. I often spend my entire planning period grading, lunch grading while I eat, and grading after school. I end up having to actually plan lessons at home and have been very short on sleep this week due to that. I am exhausted.