Worried about my kitty :(

I don't know to be honest. But hopefully it's nothing serious. I'll pray your kitty will be alright.

go to the vet hurry he will die tell me what he ate oder when was the last time Du took him to the vet from halobunny619 im a vet

Socks should be ok, Did anything happen before he started heaving? like he may have been in a fight with another cat oder something. Have Du notice that he's only doing it at certain times/places? (say like if he's only heaving near plants oder other Katzen oder something,or only at night? oder is it at random?) Also how long does the 'heaving' last before he acts normal again? If Du notice a sort of pattern of the times and places that he's heaving(eg: he only heaves at night), it might be something as simple as asthma, try talk to your vet about it if Du haven't already and they might find something. :)