We went to the Vet first thing this morning and were there when their doors opened but they are completely booked and cant see us until 10:45 even though I expained his symptoms and said I havent seen him poo or wee in over 12 hours even though he has tried at least 50 times. We are going back in 45minutes. We dropped DD at my mums earlier today and have just been cuddling Winston and patting him. he cant get comfprtable at all. He is making noises when he is breathing at times when the pain is getting uncomfortable. I dont understand why the vet wouldnt see us if this seems to be more of an emergency than other appointments (although I dont know what the other apppointments are in fairness to them).
From all the reading I have done, he has all the signs of enlarged prostate, not sure what is causing it, but cancer could be one cause, especially since he was desexed at 6months which rules out a whole lot of other diseases of the prostate. I am hoping it could just be cysts but even to remove them is difficult due to the nature of where the prostate is.

DH and I have had a good cry this morning just to prepare ourselves as we dont think it is looking good, but I am still keeping up hope that he can be treated. Thanks for all of your replies.