When the hell am I supposed to get a trademark?

Hey guys,

I recently started selling on Amazon handmade in Canada and the US. I’ve been seeing some growth recently which is great (not crazy like a top product though). However, I’ve seen a lot of cautionary tales of folks getting copycats/foreign sellers using their ASINs to sell their own products.

I’ve started consulting with different trademark firms over email and wanted to know when you decided to get a trademark and/or transparency codes for your business.

Thanks!