Someone took credit for my work… and I stayed quiet

I worked on something for weeks. Put in extra time, fixed issues, made sure everything was right. And when it was finally presented… someone else spoke about it like it was theirs. In front of everyone. And I just sat there. I didn’t interrupt. I didn’t correct them. I didn’t say anything. In that moment, it felt easier to stay quiet than create a scene. But now it’s bothering me more than I expected. Not just because they took credit… but because I let it happen. And now everyone thinks it was their work. I don’t know if I should bring it up now or just let it go. But it doesn’t feel right.