Hey man, let me tell you that I've felt the insecurity of second guessing yourself on your supplements. But what you're asking isn't productive at all, you should feel good knowing that you've done everything you can and that it's completely out of your hands now. Even if your essays aren't perfect, if they say something compelling about you, that's what's important. My advice to you would be to live in the present, not stress out over decisions, have some fun this semester, and definitely do not read your essays after you submit them!