IWTL how to talk to cops and other authority figures without automatically panicking?

2 male cops stopped me in the street the other day, and as a short gal I’d already be kinda anxious even if they weren’t in uniform with guns. They just wanted to ask some questions about something that happened in the area, but honestly I think they stayed longer because they could tell how nervous and fidgety I was. My brain kinda blanked, I could tell my eyes were darting between them, heart racing — definitely fight or flight, leaning towards flight. Not a great look.

It made me realize that if these cops paused when they assumed I had nothing to do with the incident, what if I make myself seem suspicious when they *do* think I could be involved or are actually questioning me? Hopefully that’ll never happen, but Id like to have a plan