"Should I worry about...?"
Nope. Don't bother. Worrying is like rocking in a chair - it gives you something to do, but it gets you nowhere.
Instead, pay attention or learn something useful. Then, when it's decision time, you'll actually know what you're doing. If you can't decide it or dodge it, worrying won't help.
So save your brainpower for something productive like deciding what to have for lunch.