Hey, friend. I just signed up, this is my first post here. I didn't do an MA in American Studies, but I graduated from my own MA in English in 2014 and I felt the same way that you did at the beginning of my first semester. My advice would be to stop holding yourself to the level of your cohorts and to start seeking help now. Graduate-level education isn't an isolated exercise: in my experience it's about community. At least my program was. So seek help from teachers, mentors, advisors, and even friends in your cohort. Get their help with stuff you don't understand. If you fall behind now, it's only going to get worse later. Is the reading just in different genres than you're used to?