Don't know how to take it

My hubby was suppose to go to our doctor and freeze his sperm due to the fact that he travels and some months he has trouble giving sample the morning of <a href="">iui</a> so today he was unable to give sample I think he might've over thought it. Or was stressed. I told him to relax and try again and if he couldn't give sample just go next week before our next <a href="">iui</a>. I'm trying to be supportive without getting frustrated. He has trouble with cumming on demand. I'm sure every guy would but without his sperm this won't work. I'm trying to stay positive.