I don't have a Potinara so I can't give you anything exact. Potinaras are a cross of Brassavola x Cattleya x Laelia x Sophronitis. That would suggest very high light, good air circulation, and water it good, but then let it dry out before watering again. I would check way down in the pot for signs of moisture before watering again.
It should come back. It might be a little while.
If you post a picture, perhaps we could give more precise opinions. I have questions of whether it's rootbound...has enough holes for air, size of it, overal look of it, etc.
Anyway, high light for that one would be my thoughts.