i have several tests in 2 days that i dont know how to study 4! they r in english/vocabulary test, and science test
Lock yourself up in a room where there isn't a computer or any other electronic device that will make you not study and do something else. Memorize the vocab words and review your notes. If you didn't take notes, then borrow a friend that you trust have good notes. For the vocab test, ask family members or friends to test you verbally and see if you know the words or not. If not, then re-memorize them again. Don't procrastinate because it'll only make you panic and stressed. Get enough sleep so you won't fall asleep during the test. Good luck!
'failing the lord no matter how much i pray'? This could be nothing more than Satan bringing up past failures. Make sure that they are forgiven, then tell him that he is going to burn. 'how much i sit under his word'? If you mean that you are studding, and by 'studding' I mean you take a subject, word, name, &c and find every instance in the Bible ( I sugest a KJV only) that it can be found and coralate it ( usualy by meaning ), Then are you doing what you are studding?  Ex: The Sabbath. It is the seventh day, it is the only day that GOD has ever set aside for worship. God has NEVER  changed it, nor will He.