First of all, congratulations on all the hard work you've put into your GMAT prep! Based on your scores and your thorough review of errors and weak areas, it sounds like you've built a strong foundation. If you're consistently scoring near or above your target percentile in practice tests and feel like you're at your peak, it might be the right time to take the real exam.
I completely understand the concern about burnout—delaying too long can sometimes lead to fatigue rather than improvement. If your recent scores align with your target (or are at least close), and you’ve addressed key weaknesses, you’re likely in a great position to give it your best shot now.
That said, if there are specific gaps that still concern you or if your practice test scores fluctuate significantly, another couple of weeks of targeted review could help. Otherwise, trust your preparation and go for it with confidence!
Wishing you all the best—keep us posted on how it goes