I don't want to move my car because I currently have mono.
What about the mono is keeping you from being able to move your car?
I'm only able to move my right arm and I'm in a lot of pain
At least you are taking the proper precaution for this. It's good to stay away from others when you are sick.
I'm only taking away one spot. I'm only going to be here for two days.
That is fine, and it sounds like you've already figured it out. I am sure that two days isn't enough time for anything bad to happen to your car.