Thankyou ladies

So, after DH trying to back out of going to the appt a few times and rocking up late, we finally got called in to see his GP.
DH revealed that a very very little amount of semen does actually come out, whereas I could have sworn he told me NOTHING was there! Oh well, anyways the Doc seems to think it's only to do with better diabetes management. DH needs to be taking better care of his sugar levels, and we should see an improvement in quantity.
He needs to give a urine sample and get some bloods done to see where he's at with his diabetes. Doc also said to cut out any masturbation and 'save' all the good stuff for when we DTD
I'm not sure if the very minimal quantity would have any adverse affect on the quality of his sperm?

So, I am feeling quite hopeful that this isn't as bad as what I was imagining and very fixable. Will try and get DH to take some zinc and fish oil and maybe some royal jelly for the both of us?