Low sperm motility

What are the best supplements for sperm count and motility ? My husbands motility is 10% - dr said should be 30%, and sperm count 30%- dr says they like 50. Side note, he told him it’s probably not him. Are you kidding me ? I’ve changed my diet , my lifestyle m, I’ve been stressed and obsessive for 9 freakin months, and suffered 1 miscarriage after 4 weeks. I just now decided to have him tested. We already have one daughter.