Husband sperm test at 0%

To make the story short we are both 27 years old, have been trying to conceive for a year with no luck i went to a gynecologist to get checked out everything turned well for me. From the beginning he suggested for my husband to do a sperm test. Well after convincing him to do it he finally did i went to pick up the results and it came back that he has 0% no live,dead, nothing at all 😔 i went home and told him the results we were both devastated and started crying together, my gyno referred him to an Urologist He examined him and told him that he probably has a problem with his testicles and that he has to do a testicular biopsy to see if he does reproduce some sperm after all, has anybody gone through this ? Can they tell me how it went ? Im really trying to be positive for him but im afraid there is no sperm and that we wont have children ever 😭😭😭