Low count & mobility

Has anyone else’s husband been diagnosed with low sperm count and mobility and was put on a medication for that if so what kind of medication did they try him on? Our fertility specialist keeps ordering sperm test we’ve had three already that show with the same results but he’s not talking about anything with him they just called this morning to order a another sperm test I don’t see why we need four. It’s really starting to feel like all their going to do is continue ordering the same tests just to get more and more money. I really hate to think like that but if someone else is been in the same situation by all means help me understand why they’re doing so many of the same test