My kitty is sick

The picture is my HEALTHY CAT:



Now for 12 hours he's been throwing up white and not eating nor drinking. Idk if he's used the restroom but hes male 4 years old named Joker.

Idk what to do my parents might take him to the vet if this goes on for another day. But that's money we don't have. He's been laying sick in the same spot on my bed all day, and he hasn't thrown up yet. But his breathing is slower than usual.