This is how school felt sometimes. You had so much going on. You had your schedule to memorize, teachers names, class rooms to find, way too many assignments, and the list just never seemed to run out. But it never stops does it. Your brain is going to get full everyday, probably several times a day. And you don't have to be in high school to have these experiences, they are all around us. We all have those nerve wrecking situations, deadlines, appointments, jobs, family, friends, etc.
And one reason that list never ends is because we are all different, unique. The things that fry my brain, may not even be a thought to you. That's how we were created, we all go through challenges that will test us, and push us to our limits. But there is one thing that we can all rely on, and that would be God. When we rely on Him, we realize how it all works.
Take this scripture in 1 Corinthians 10:13... "There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it." Now it's talking about being tempted, but you can apply it to your situation. God will never suffer us to be put through anything we can't handle. He won't let it happen because He is our Heavenly Father and loves us.