Get the MRI and surgery.
Recovery will not cost you a year. If a doctor tells you that you might want a second opinion. If you are that concerned wait until summer or a school break to get it done and you will have 3 months to go through the worst of it.
I did not have ACL and PCL but I ripped my ACL and tore the meniscus. You will have one week where you are laid up in bed on some heavy drugs, then a week or two on crutches.
I was back walking without crutches after two weeks (with a limp and some discomfort). So it should not interfere with your classes.
The most time-consuming thing is rehab.
If you intend to play seriously again you have to treat this like a job. I used to go for one hour 3 times a week and they would recommend about half hour to one hour of daily home excercises.
I never did the home excercise and I am paying for it.
But all it takes is discipline. As a student you could find one hour a day to work on your health. If you don't do the operation you still have to rehab to get into running shape. In fact you have to rehab just to get into shape for the operation.
Pros have an advantage over laymen because they could rehab whole day and sit in oxygen chamber because that is their job and they can be back to playing fitness within 6 months to a year.
Keep in mind that if you don't do it you risk worse injury in the future and even if you don't play again you will be looking at knee replacement as an old man. No wining down in SWWTU hall for you.
Also if you are in a US school you have already paid for insurance so use it. Operation, rehab, cooling cast, extension machine should all be covered.
Trust me when you hit the working world you will have much less time available to do the operation and rehab should your leg worsen.
Good luck and PM meh if you need any more info.