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Sorry for the delay!
Your cat needs to get to a vet tomorrow. As long as there is alittle urine it is not as life threatening. What has happened is your cat has a urinary infection and possibly crystals. The urethra is so narrow in cats that they become blocked and this can be fatal.
You need to take your cat into the vet FIRST THING in the morning. If no urine is coming out now or your cat is refusing to move and crying in pain...you may need to seek an emergency vet. The problem, aside from bladder rupture, is more the bodys waste that is backing up thru the kidneys and making the cat toxic.