Yes, and the leaking when she is lying suggests a problem with the tubes, likely a ureter (tube from kidney to bladder) that bypasses the bladder sphincter, so she cannot turn off the flow of urine.
It is not likely to get better, and urine scalding can cause nasty sores on the back legs and will attract flies.
Consult your vet who can have a better idea if he sees her in the flesh but I would think it probably kinder to put her out her misery before it gets worse.