I will say XR tends to be less noticeable since it’s “spread evenly” throughout the day so keep that in mind!
BUT I do agree with Jenerator. If you’re not noticing any difference, and you’re not having issues sleeping/eating, I would call your doc now. You can also ask them what to do with the 20’s you have left. But maybe a slightly less responsible thing to do is keep them somewhere safe and in an emergency (insurance doesn’t cover your meds, etc.) you have a backup plan in case you’re left w/o meds for whatever reason.