Testing in Medical School: Help?

Hi! I will be starting medical school this year (likely at a DO school) and I feel like I'm already completely overwhelmed by all of the different tests that med students take. What is COMLEX, what is USMLE, what are the steps, what is all of this and when do I take them? Help!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical (DO) Source Type: forums