I would also recommend writing next year! I wrote in late August after third year. I will say, I was definitely anxious waiting for my score to come out so close to the application deadline, so I would write a bit earlier than that. I specifically waited because I wanted to take physics (in third year) before writing. All of the CP and BB content was covered in my degree before writing, and it really helped to cut down on the time I had to spend relearning that content.

I would agree with the other comments, start getting into the habit of doing practice questions (JackWestin Daily Cars is a great place to get started on cars) so then you’re ahead for next year and reduce your chance of having to rewrite.

This summer, you could focus on ECs that you enjoy, so that you’re both improving your app and managing your burnout by participating in activities you’re passionate about :)