Help 😔

So my cat had a urinary block last month. The vet said it’s common in neutered cats, well the bill ended up being 1,300$ we could barley afford that but we did it. Well 3 weeks later after all his medication and so on, it seems like he’s experiencing the same thing again. I don’t know what to do, we can’t afford another 1,300... what do I say when I call the vet tomorrow? I’m so stressed and feel like crying