r/throatsinging

When I was learning Kargyraa I finally found the sound i had wanted. The deep throat singing that vibrated my whole chest without pain or itchiness. I could do that for a week or two but then one day it switched. I dont know how it happened but now my Kargryaa sounds higher, vibrates less, and itches my throat after just a little singing. I dont know how to go back to the sound I had.