Possible zero sperm count

My husband is 25 and we have been trying for baby 1 for 2 years. My labs were normal. He finally went for a semen anaylsis and barley was able to give a sample cause he was so nervous. They called and said they want a better sample and the one he gave had a zero count. Ive been super upset about it and I know he has too. Now we need to figure when to reschedule . ive been constantly thinking about it and worrying. I also work on a labor and delivery unit so it hasn't been easy for me either. I know he feels guilty and its hard cause he also doesnt want to talk about it. They want a retest and I just hope its better than the first but the nurse even said she doesn't think he will have "stellar results". I need some positivity and maybe some success stories. This has me in such a funk 😞😞