Ok, thanks for the answers. I kind of forgot I posted this til just now (oops!)

By "professional" I mean suitable for the hospital.

Currently I use my backpack from about 10 years ago, a regular school backpack from Greatland. Sadly, the bottom is nearly see-through. I DO have a Wegner bag from Best Buy, but it fits my laptop perfectly. Anything more than 1 review textbook (not even a full size!) and it's overloaded. It looks great, but doesn't have a lot of "give" either.

Maybe I'll break down and get 1 size up? On the other hand... I don't usually use my computer at work, so I could carry my books there.

Thanks for the feedback all. I guess I'll probably just make due with what I have for the time being.