Do you have a actual card? Or just a code? It'll say trial on the card, along with it saying current game pass members, or previous trial members can not use trial codes. If it's just a code then I recommend testing the code on Microsoft, xbox, or the xbox app. Test the code there, an itll tell you what you get, an should say if it's a trial code in the title. Once it showed you what you hit, back out or just hit cancel.