Taking Calculus II next semester...What should I expect?

Hi,

new to the forum here.

I am taking Calculus II next semester and every math oriented person I've ever talked to has told me it is by far the hardest math class. It has got me kind of worried. I've taken a business math class (no trig), and we used very basic integration techniques. Integration by substitution, and Integration of the very basic functions (e^x, ln x) as well as some applied problems with logistic growth.

What makes Calc II so much harder?

My Calculus I professor always talks about how all of his A+ Calculus I students got into Calculus II and failed miserably.