Hello thank you for sharing your experience and how wonderful that you were able to recover your voice.
On the other hand I also share with you that I really like tea and infusions and that's why one day I came across this BOLDO tea here in Venezuela we call it acetaminophen tea.
It was in a publication that I was giving away this plant that a family doctor explained to me that this plant is highly toxic to humans and that it had caused the death of some children. So I investigated, and yes, it is a toxic plant. So I invite you to do your research and even from nature we should study well before ingesting anything. Here are some of the reports that I have researched.
"Boldo paraguayo or Acetaminophen Plant. analitica.com. 09/06/15. This plant contains Ascaridol, an active component of high toxicity not recommended for human use.
Contraindications and toxicity risk
Boldo tea, despite its alleged benefits, contains significant amounts of ascaridol, a toxic compound, the main component of Chenopodium Oil, banned for years precisely because of the risks of serious toxicity. Boldo overdose can lead to overexcitement, cramps, exaggerated reflexes and convulsions, according to the "Practical Guide to Natural Medicine" of the American Pharmaceutical Association" reference taken and translated from https://www.sertox.com.ar/es/toxicidad-de-plectranthus-ornatus-codd-y-un-nombre-comun-que-confunde-planta-acetaminofen/#:~:text=It%20is%20important%20to%20make%20clear%20that%20consumption%20can%20produce%20death%20.
I hope my comment is taken as it was taken to me, I only write it out of my concern that nothing bad happens to anyone.
Blessings and have a wonderful holiday.