I’m happy to inject myself wherever, whenever, though it can be a shivery experience on cold days.
The only time I met with The Look was years ago in a train carriage: I took out one of the old syringes, those big glass and steel ones, injected myself, and looked up just in time to catch the older woman opposite me turning to her husband and whispering ‘junkie’.
I didn’t bother to explain at the time but looking back, I should have. I think I was amused, but it was a missed opportunity to educate.
Maybe if asking for needles at the pharm tech feels embarrassing then you could ask for ‘insulin needles’.