I've read majority of MTB2/3 and have probably 48% of my UWorld left to complete. Almost at the end of my third year as well. I have also completed CMS Form 1&2 IM, Form 1 for Psych and OBGYN
Don't sit that Exam bro , your not ready .. I would rather apply late than wear a AZZZZ whooping for the rest of my life by failing . Take a few days off , regroup and set a fresh plan then go to work .