I have a 3yr old, male,fixed, house cat that I had taken to the vets today, they said he had a urinary block, so they put in a cathiter just for a short time. When they did this blood came out with his urine.They sent that out for a test and will find out results tomarrow so in the mean time they gave him a Bicllin injection but nothing for the pain I can see he is in. What can I do for him to ease his discomfort? He has gone pee, there was some blood in it but his back legs kinda twitch like he's having a spasm down where he pees.