diff --git a/internal/plugin/social/instagram.go b/internal/plugin/social/instagram.go
index d05bd30..c1dbe1f 100644
--- a/internal/plugin/social/instagram.go
+++ b/internal/plugin/social/instagram.go
@@ -48,12 +48,16 @@ func (p *InstagramExpander) OnMessage(msg *model.Message, config map[string]inte
 		parsedURL, err := url.Parse(link)
 		if err != nil {
 			// If parsing fails, just do the simple replacement
-			link = strings.Replace(link, "instagram.com", "ddinstagram.com", 1)
+			return link
+		}
+
+		// Ensure we don't change links that already come from ddinstagram.com
+		if parsedURL.Host != "instagram.com" && parsedURL.Host != "www.instagram.com" {
 			return link
 		}
 
 		// Change the host
-		parsedURL.Host = strings.Replace(parsedURL.Host, "instagram.com", "ddinstagram.com", 1)
+		parsedURL.Host = strings.Replace(parsedURL.Host, "instagram.com", "d.ddinstagram.com", 1)
 
 		// Remove query parameters
 		parsedURL.RawQuery = ""