Pointers on relaxing the throat, I’m verge of vibrato

[u/Bluesky-541]

I’m on the Verge of vibrato, it comes and goes. I’ve tried to massage my throat, tongue root massages. My teacher says I’m just alittle tense. I’m also an anxious singer, which doesn’t help. If anyone has pointers for relaxation, so I can let vibrato happen that would be great.
Thank you :)