Laryngitis for 2 weeks, are my vocal cords screwed?

So I mentioned this in another thread a few days ago (which gave some great advice, thank you all for the advice!), but I got an upper respiratory infection/virus 2 weeks ago and a few days in I lost my voice. The infection is gone but I have never gotten my voice back.

Went to my ENT doctor (I had a deviated septum that was repaired by septoplasty last year) who said it was a fungal infection. Gave me Diflucan and Nystatin to clear it up. Called back on Friday and the nurse assistant agreed that my voice should be sounding better by now. I have been put on complete vocal rest over the weekend and see my ENT doctor again tomorrow.

From what she said, they'll be doing a more in depth look at the throat and vocal cords and taking images by camera. I guess it's a laryngoscopy which will hopefully give them a better idea of what's going on.

First of all, has anyone here had a laryngoscopy? Is it painful? I've had to regular endoscopy before and those don't really bother me but I'm sure this could be different.

Second, I am scared. I've lost my voice before but it's never stayed gone. My voice has come back to some extent but it's not my voice. My regular sound isn't there, heck I almost sound like some villain. I'm worried I'll never regain use of my voice again. It feels as though I've lost an arm or a leg.

If I never regain my voice I don't know what I'll do. I probably wouldn't be able to stay in the position that I love so much, it involves a fair amount of talking. I honestly don't know what I would do.

Has anyone else had this happen? Am I overreacting or does this sound like something very serious? Could it be lung cancer? Cancer doesn't really run in my family but I have given it a thought. I feel so powerless right now and it's a feeling I'm not used to.