Pchem is one of the most difficult classes I've taken, but definitely do-able. I'm not gonna lie and tell you "you'll be fine' like some did to me... just study more than you would for your other classes and you should be ok. Schroedinger is the ****... actually, a big steaming pile of it. I love ochem and wish the rest of my chem major was influenced (at least a little) by organic, but no. Definitely try to understand the lectures as best you can (notes don't really help if you can't understand the ****) and talk to your prof if you are confused. The texts on this subject explain topics, but don't help if you're lost. If you are good at math (that is, math w/ few to no numbers) and the basics of chem (like orbitals and that stuff) then you should do fine with ample studying. PM me if you have specific questions during the course; I'd be more than willing to try and lend a helping hand.
Hopefully your prof goes over the "cat in the box" problem; it pretty much sums up the craziness of Pchem!