Did this girl show slight interest in me or am I overthinking it? And how can I go back to continue?

Anonymous
Met this girl who was a cashier at this game store. She was the only one in the store so i asked her about something in the store and that sparked a kind of long conversion about it with her. Most of the time i get really nervous talking to a cute girl but not her i didn’t get to as nervous. Our convo was cut short because a coworker of hers came in so i left. She told me it was nice talking to me and to to come back and show her if i got anything new. I didn't get her name nor she get mine. Did i blow my chances to get to know her better or did i have no chance at all? How can I approach her again and maybe ask for her number and to hang out? How long should i wait to go back its been almost 2 weeks since i met her
Did this girl show slight interest in me or am I overthinking it? And how can I go back to continue?
3 Opinion