Cool down your enclosure by 5 degrees. Cover the enclsoure or keep the room as dark as possible 24/7. You can feed, but it's not neccessary. Wait about 2months, bring up the heat, uncover the enclosure, start feeding with slightly smaller prey. This is called brumation. Some say you don't have to if you're not breeding, but it won't hurt.
If this isn't for you, keep everything up like you've been doing, maybe you can cover the enclosure to help with any stress.
This is all pretty common.
Jim Smith