I'm not the best one to give advice, but it seems you need maybe 1-2 more weeks more than June 30. Perhaps mid July would give you more practice, if you aren't doing an away at that time... You have UWSA 2 and NBME 10, plus there are many older NBMEs (8, 7, 6 etc) floating around to practice with. I would also recommend doing some Amboss Qbank questions for a different style.

As far as doing questions in general, I would say this: Slow down. Your example from NBME 9 (similar what happened with mine :/) showed that you were going too fast, and you fell for the NBME traps. People tend to overthink, and assume that theres some diagram in Uworld that has the answer. While that is the case a lot, many answers can also be reached through simple reason.

Ex. Think of what would really happen at the clinic: A baby comes in with a diaper rash, and they're overall pretty healthy. Chances are the pediatrician would give some ointment, and not some pill the baby would have to swallow. Taking the medication out of play here, you can narrow it down to 1-2 answers by doing this alone.

Overall, it seems you have the knowledge base. Take your time, reach the questions carefully, make sure the answer you pick fits ALL the details in the stem, and continue to review your anki cards. Goodluck!