New to drop shipping, need some advice.

So I just started this new store a couple of days ago that sells neck massagers (https://stalla.store/). I have been spending $50 a day on ads now for 3 days and I have gotten ZERO conversions. I am using TikTok ads and they've never worked before but they seem to work for everyone else. I am honestly just confused and I don't know what to do. My creatives are good (just edited UGC), and my offer is way better than many of my competitors. I don't want to just keep wasting money on ads for no conversions, but I also believe in the product because some other stores are scaling really hard with it. What should I do?