Hi, Clare.
I'm sorry that your husband is having problems, but it's lovely to see that you've joined the forum to help him. Welcome.
Your husband's PSA is elevated but not drastically. His raised PSA and frequent urination at night (nocturia) can be caused by other non cancerous prostate conditions.
Urology will probably do more blood tests and recheck his PSA. They may decide to give him an MRI scan.
His family history of the disease does increase the risk of him having it. However, at this stage, I'd advise you to take one step at a time and try not to worry.
Please keep us updated. You'll get lots of support here.
Good luck.👍