Feeling like I will NEVER get pregnant

My husband has taken in my two boys from a past relationship in which the bio father is MIA and in and out of jail. He and I would like to have another baby. I always wanted more. Thankful for the two I already have. But at least one more. We’ve been trying since Oct 2016. I’ve had kids so we started getting him checked. Two sperm tests showed so much white blood cells that we can’t see sperm, quantity, mobility etc. So Dr ordered hormone blood test which came back good. A couple things out of range but nothing to be alarmed about. Dr ordered the genetic test to see if he’s XXY, nope he’s not. Dr ordered ultrasound to be done of his scrotum cause he’s past fertility and now concerned about a male health issue. Insurance denied ultrasound and urologist referral so we’re trying to get that fixed. But I feel like we’re going no where, not getting answers, and as long as his white blood cells are down there, I ain’t standing any chance to get pregnant. Another month another few negative tests and of course my period. I’m scared and feel like times running out, and it’s not gonna happen for us. But I also fear something’s wrong with my hubby. 😢