I'm sorry, but there is no home treatment for wheezing that anyone on here can suggest. Your cat really needs to see a vet. A large part of being a responsible pet owner is taking care of the cats medical needs.
My 4Year old male cat, every time he's asleep he always make a wheezing sound, am very worry about him, he seems to be fine eats well, and drinks his water plays with other cats very friendly, but that wheezing at night makes me worry I can not afford a vet. Can anybody help me please.
Could be asthma, my cat suffers with it and I have to administer ventolin in a special chamber every couple of days. My cat is 16 and I always fear that he will have a bad asthma attack and die. You say your cat only wheezes when she's asleep well my cat only wheezes when he's awake so maybe its not asthma. Keep trying to find a vet that will help or speak to one over the phone about it.
I discovered a trick with my kitty that hates to be picked up or be on the exam table. I got a kitty carrier that I can take the top half off easily- we just unscrew 8? or so wingnuts to take it off. We leave her in the carrier on her towel and keep petting her- she loves her tummy rubs so if I keep her occupied with her tummy and cuddles- she doesn't freak. With the bottom half and her towel she doesn't feel so open and exposed- and I don't have to try to pull her out- it's like she's got 25 legs- all with claws from hell...
If they do need to do more- like figure out why she wouldn't walk on her back leg- they put her in a clear box thingy and sedated her. Poor thing had an abcess between her toes- what a goof.
Usually if a kitty is violent, a reputable vet or animal hospital will administer a tranquilizer for examination. Of course, this isn't ideal for examination, but you work with what you've got. :)
I would say you have to hunt for a better vet. Make it clear exactly what has happened with the other vets. Be clear on this; if you don't get the impression they're doing proper treatment, then you won't pay (a sedative followed by xrays and perhaps a nasal scoping sound in order, as well as blood work)..
Otherwise..there's a few things the problem can be...from asthma to low level respitory infection from other causes to, oh, say nasal polyps. But...without more examination oriented info, I can't guess.