Hugs to you! You sound like my daughter who is a freshman at a prestigious university studying engineering. She is on the quarter system and is going through the same thing as you- so tired from High School and confused about her major. She went to her advisor and his advice was (and I quote) - pretend you aren’t in engineering when you are registering for second quarter. So that is her plan for next quarter. Be patient with yourself. I know that it may seem that you have to make these decisions now (major, career, etc) but you don’t. Think about how much your world has changed in the last 8 weeks. Imagine how much it will change by June of next year. You have time to figure this out. Best of luck