Stubborn hubby....

Harriet
We have been ttc our second child for over a year using ovulation kits and all....have been unsucessful. I asked him to get tested and he refuses saying that our son is proof enough he does not have a problem....I have a lot of health issues and have been told it's a now or never type deal. My hubby bought a home sperm check and secretly did it and claimed it came back normal. I saw the box but never the result. Should he go get checked or am I being unreasonable?