Going out of the country for 3 weeks

Hi, my doctor knows I travel abroad for work every so many months but I’ve never had to leave for over half a month. I just filled my script on the 28th and realized my refill will be due the 28th of July but I don’t return until August 10th. note I leave on July 18-19*

Any tips? I’ve never done a travel override but I’m sure my insurance would allow it with documentation. Is it better to try and fill my whole script when I leave on the 18th? Or ask if they can do a partial fill? Long story short l—I just want to not seem sketchy and do what’s easiest for the pharmacist and my doctor

Thank you in advance!