Grade 3 Thyroid lump - what is the vocal cord check like?

Hi everyone, I have lurked on here for a while since finding the lump on my thyroid back in I think June time. I eventually went to the doctors at the end of September, & was referred to ENT. 

Was found to have a 3cm lump on the right side of my thyroid, and was sent for a FNA towards the end of October. I never heard anything back for a long time so assumed all was well. At the beginning of December I rang the hospital to see if they had my results, & was informed I'd to go on Christmas Eve. Was told then I had a grade 3 tumour & would need partial thyroidectomy to find out for sure if cancer. Then on Christmas Day I caught Covid (all was well I've ctually had worse colds) but then missed my pre op as I was isolating. 

Never heard anything back from them so rang again to be told they had to wait so long after Covid due to risk of blood clots on lungs. So I informed them I was on holiday for 2 weeks in March so needed to be fit to drive.

They have just rang me to ask me in next Thursday for a vocal cord check, & to say my surgery is scheduled for the 8th April.

I'm feeling pretty good about it all & not overly worried about the results or the surgery. However I'm anxious about the vocal cord check, as I've heard it's a camera down the throat & I have a terrible gag reflex. Has anyone had this test & can tell me it's not as bad as I imagine?

Thank you