I love your username, it reminds me of "Mr. Terrific" from the DC Universe.
I have not used online MedEd, so I cannot really comment on that. My feeling is that you know what you need to know but you are having trouble applying your knowledge to USMLE style questions. Personally, I would not read MTB again, but your own notes might be helpful.
I would do a subject mode 3rd pass in UWorld, beginning with the weakest subject and so forth, i.e. OBGYN -> Pediatrics -> and so on. I would blend in the related CMS forms. I would do all 24 forms if I were you. You could do 1 per day to not get overheated. Look up the information for the difficult / wrong questions in your notes (because familiarity always helps memory), Uptodate.com, or any other source you feel comfortable with.
However, that being said, I would not blindly do a complete UWorld pass. I would only do the marked/incorrect questions. You definitely know most of the material, and you should not waste time on the information that you have already consolidated.
You might be wondering why I am suggesting subject mode this late in the process. Well, first of all, I never did a formal random mode pass myself, and given your situation, it might help you really understand each and every subject better with their little tips and tricks. The overlap between questions will also help you build confidence which is your best friend right now, because you will start to get that "oh yeah, I know this because so and so" feeling more often. Mixing it up with CMS for each subject will give you a strong pre-test foundation and will make more sense then throwing these forms in randomly. You want that "I can handle this subject, let's move on" feeling. Work hard on separating the useful information in the stems from the useless, even if it means that you need to do untimed mode every now and then.