Well I guess some scores are contagious here.
Raw score = 94
Percentile > 95th
To be honest, I have no idea how the hell on God's green earth I pulled this one off. My stress level in the final 7-10 days of this rotation was terrible, to the point where I was vomiting up my breakfast several times in the week of the shelf exam. Could not eat. Could not sleep. Could not relax. Seriously counted down the hours until my exams and all of 3rd year were done for good. Regardless, fought through the pain and kept studying whenever I could. Proof positive that what they say really is true - never give up, no matter how bad things become.
I used Step-Up to Medicine (x 1.5 - I re-read the higher-yield sections), did about 1200 of the Internal Medicine UWorld questions, did all 8 of Kaplan's QBook practice question sets (50 Q's each). While doing UWorld, I became mad when so many random Epidemiology, Neuro, and Ophtho questions would pop up, but figured UWorld just had no place else to put them except under "Internal Medicine", so I just read through them anyway - certainly paid off on the shelf.
Exam wasn't bad, but that's probably a relativity thing because it was my final shelf exam of 3rd year, so I knew the answers to all the Surgery-ish and Ob/Gyn-ish questions. Exam content seemed particularly heavy in Renal and Pulmonary topics. Stems were so long, I just skimmed most of them to save time, I'm certain I missed a few random details, but oh well. Knew walking out of the exam that there were at least 2 questions I missed.
Glad this one is over. Big thanks to everyone in this thread for pointing me in the right directions. There really is no substitute for good old-fashioned hard work.