I'm furious about husbands low sperm count

Eva
I'm 36, he's 38 and have been seriously TTC and tracking the last 8-9 months. I have hypothyroidism and was convinced if we had issues it would be because of me. So I track, POAS regularly, buy pre seed and soft cups, have us both on all sorts of supplements and put all this effort in. I told my husband in Aug/sep that I wanted to do fertility tests to rule out any issues because I turned 36. He convinced me to wait a couple months...
so we just went yesterday. For once, I'm fine. My hormones are good. Have an HSG on Monday and dr said yesterday if all is good, he thinks I could be pregnant by Dec. 
but then we get my husbands semen analysis back today and it's very low. My husband says, "oh maybe I should have told the dr that I had surgery when I was 12 to lower an un descended testicle. "
Ahhhhhhhh! He never f**king told me that. Of COURSE it's a major factor in male fertility. One Google search would confirm that.
I'm so pissed off. I'm doing all the effort and research and he just fails to mention that. And his general response today is "oh well" while I'm talking to the dr and frantically researching all this. I'm so angry and so sad. I know there are treatments but the wasted time is infuriating.
Ladies, go get the tests run on you both. Don't waste months like I did!
If anyone can share what happened to them after finding out about low sperm count, please do!