If you're feeling as though you're drinking from a fire hose, you're not imagining things. Your professors are throwing so many concepts at you that you should feel overwhelmed. (If you don't feel overwhelmed, you either come from a family of lawyers or you are excellent at repression.)
Now's a good time to pull out our book and read (re-read?) Chapters 3 and 4.
And don't forget to breathe.