Ttc low sperm count please help me ?!

Molly
We have been ttc for 18 months now with one misscarage ! My partner has a low sperm count and mobility 5 million per ml and 20% mobile. Ttc has taken over my whole life and I just carnt relax and think about anything eles no matter how hard I try I feel heart broken every single day. Does any one have any advise ?? Or stories ?? We are going to see a infertility specialist in two weeks but nobody has been able to help. We have tryed Macca and fertilaid for men.