I was overwhelmed when I saw my own video on another page

I have a small page on Instagram where I share practical recipes and daily things from home. Last week, I saw a video I shot on another page, the same frame, the same sound, they just slapped their own logo on it. I politely commented asking if they could credit the source, and this time they deleted my comment and implied that I was targeting them in their story, and since yesterday I’ve been receiving silly messages from accounts I don’t know. I don’t know if I’m overreacting, but I’m getting stomach cramps and my heart is racing, and on top of that, it feels like if I close the account, all my hard work will go to waste.