Of course! Prayer is good for all of us, but especially when such an important decision is to be made.
Have you drawn up a balance sheet of why or why not to go to grad school? You sound like it weighs on go!
How about making a simple outline for your essay first? No big brain thoughts; jot down a few words on each idea and then walk away and leave it for a bit.
You know, you can go ahead and apply. You don't have to accept. If you should be accepted great! But there's the chance you won't have everything in line for acceptance, so you will get another semester or two to work on that, and fully decide. But you won't know till you try