3 weeks out, NBME 15 score drop. How to prioritize studying here on out?

I just took NBME 15 and got a 258. 13 days ago I took NBME 14 and got a 261.

After NBME 14, I grinded 13 days' worth of UWorld and haven’t fully exhausted UWorld yet, but am averaging around 80% on every block with about 85% of uworld completed. (Used a lot of the qbank during third year)

While taking NBME 15, I kept feeling like many answer choices were very tricky, and I ended up changing my answers more often than I usually do and got several of my changes wrong. Looking at my score report from 15 compared to 14, most areas I went down a couple of percentage points, so it seems to have been a more difficult exam for me across the board.

I’m three weeks out now from exam and am gunning for 260+ for the surgical field I am hoping to go into.

Part of me wonders if at this point my content is good enough from UWorld and should just focus on test taking and other resources. Really could use some advice as I’m frustrated to see my score go down on 15 after a ton of questions since NBME 14.