Agree with margarita.
It was around this point, when I was an intern, that I had my "six month review" with my PD. I flat out told him "I don't think I'm cut out for this. I'm not learnign anything, everyone around me seems to know more than I, and I just don't think I am cut out for Emergency Medicine." I'll never forget, he said
"Quinn, I felt the exact same way you did when I was in your shoes."
Its just something that happens around this time. Call it the intern blues. Call it second guessing your choice. Who knows.
But give yourself another 4-6 monhts. You'll come out of it. You'll realize you'er learning more than you thought you were. EMergency Medicine just kind of... "clicks" and you begin to REALLY learn it, actively. Right now, there is just so much information being thrown at you its hard to synthesize... "Kanavel's signs, hard signs of vascular trauma, nitro versus nitroprusside, preeclampsia labs, foul smelling lochia, pain out of proportion, pain on passive movement, jolt accentuation what the hell is that?!?! AUGH!" But come early PGY2 you'll feel much better.
Q