When to test for fertility

Hello!

My husband and I have been trying to get pregnant for about 6 months now. He had undescended testicles when he was born, but had the surgery to get it fixed soon after. I’ve been told it could be the reason why we aren’t conceiving... Is it too soon to see a fertility doctor? He seems to think so but I am so discouraged every month getting my period. I just want to know.