Up, up and Gasping

I need helps regarding my himmy. Here's the condition that I uploaded on Youtube.

                                       

So, it's been a month or so that she's like this. Always looking up and breathing thru her mouth. Especially during the past winter season. However, since it's a transition to the Spring, it's not as worse as before but still, I'm a little bit worried about her. And the thing is, I already brought her to the vet in a pet shop, but the moment we arrives, she seems just okay. Lol. Don't know why. Anyway, what makes me sad is the fact that some times, I can see her sleeping in a sitting position while facing up. Though it seems quite cool and unique, I'm a little bit concern or is it normal for cats to sleep like that?

p/s : Again, sorry for my broken English

She looks very sick.. I would take her back to the vet (a different one if you have to) as soon as you can.

I agree with Minka, time to take her to the vets. 

As you may know, Himalayans are prone to breathing and sinus problems because of their shortened face.  Her breathing/sinus problems may increase/decrease due to allergies, including environmental ones.  Maybe the air in your house is drier during the winter/summer?

Her fur looks really really long, too.  Does she like being brushed?

Hi, your english is excellent.

 I agree with Minka and Ritz;

 Cats can have many health problems as well as respiratory problems. It is possible  that she could even have asthma. They can have a lot of   the same health problems just like we humans do.

 Breathing problems in cats can mean a number of things. Perhaps she just has an allergy, or more serious heart worms and Asthma as mentioned above.

I do not know the Himalayans but She looks like a persian. Breathing problems in Persian cats, occur due to their genetic make up. They have a short muzzle that causes restriction of nasal passages. Thus, leading to a convoluted nasal passage.

 Perhaps the weather is humid weather and hot with you which will make her worse.

  She is not an old cat, so it unlikely she has pneumonia, (hope I spelt that right) bronchitis,or heart problems.

 I have not seen a cat breath like that before.
 I hope your vet will be able to help. She is a beautiful cat. Good luck.

Selkie

Ritz : She does like being brushed. Thank God. Lol. That makes thing a lot more easier for me. But about bringing her to the vet, I'm having a little difficulties because I just brought her five hours ago. Like I said, she'll turn out just to be okay when we arrived to the vet. So, the vet just noticed her watery eyes and bad smelling breath which I already equipped with the medicine, just now. Hurm

Could you have your vet look at that video?

I think you need a new vet.