Were you at 3000 three and a half days post injection? At trough? Seems high following a 125mg dose.
I don’t think there is a “best” method in general, best is whatever works you individually.
Probably 90% of the men on TRT inject once weeky if using TRT practices or using underground sourcing and self dosing. If using PCPs, urologists or endocrinologists, most of them are twice monthly. Most participants here inject much more frequently.
You could go to once a week, but then you’re going from 125mg injections, twice to 150mg once, and you may not like the way you feel by the end of the week. No harm in trying it, you can always move back to twice weekly very easily if you don’t like once, just a matter of if you can feel the difference from the higher level to lower vs the more mid range levels obtained with twice weekly injections.