Dumb intern

Feeling like the dumbest intern in my class and I'll be a senior in three months. My attendings keep telling me I'm where I need to be, but...

My cointerns are constantly talking about patients and mentioning clinical pearls I've ever heard of. I struggle to develop differentials and I am constantly looking things up. I don't think I've progressed since starting the year at all.

Is anyone else feeling like this? Is this normal?