Did I Handle That Awkward Moment Right?

As-salamu alaykum, everyone. So, I'm not a Muslim myself, but I really respect the community and hope I don't mess up any terms here. I popped into my local grocery shop, which is owned and run by a wonderful Muslim sister. When I (a guy) walked in, the place was totally empty except for her. She had her hijab off and her hair was down, and when she noticed me, she immediately put it back on and looked super embarrassed. I averted my gaze as soon as I realized, but it took me a second, and by then she was already fixing it. I felt terrible for making her feel uncomfortable, but honestly, I wasn't sure what to say, so I just carried on like nothing happened. Do you think that was the right thing to do? I'd appreciate any advice from a Muslim perspective. JazakAllah khair for reading.