I'm a somewhat experienced trumpet player — not sure how to quantify it since I played intensively for a few months about a year and a half ago and then didn't play so much after that until about a month ago when I dove into another intensive practice schedule. My ability to play high notes is still developing pretty quickly — last year A5 (5th partial) was barely attainable, but since I started playing again it's become something I can hit much more reliably and I've managed to squeak out a C6 for a moment.
I'll be playing in a concert in less than a month and I'd like to be able to land high notes as cleanly and reliably as possible by that point in time. My question is this: in order to best meet this goal, is it advisable to take days off from practicing to let my muscles recover and build strength? Is one day the longest I should rest? How frequently should I take rest days? When I do practice, should I stop playing when it becomes extremely difficult to play notes that are normally within my range?