Azoospermia come back?

I’m so nervous. I triggered tonight for retrieval on Friday. My husband had azoospermia and saw a urologist. He takes vitamins/medications every day and he was able to produce sperm. It’s low but it’s there.

I’m so nervous that on Friday they will say he has zero again. I know he’s worried as well. I don’t know if we should be worried or not. So nervous about egg collection and the possibility of no sperm to fertilize them. I’m trying to be positive for him as well as me. It’s just so hard!