I plan on going over all of unit 2 and 3 tomorrow. It's doable. It's probably going to take you all day but, I guess it's worth it for a good grade. All you need to do is make some good notes on each topic, do past exam papers and make model answers. Physics 2 is, for the most part, equations so make sure you can rearrange them all and that you know all of the units. You'll do fine!