Respiratory Disorders :: Difficulty Breathing

I have had a terrible affliction for more than 3 months now and it is greatly affecting my life. I am 25 years old and in general have never had a
problem with my health or anything. I have lived in São Paulo, Brazil for 6 years which has very polluted air due to its large population and high altitude.
I am having difficulty breathing in general. It feels like I am not processing the air that I breathe. Here I am going to list all of the symptoms I am feeling:

-Exercise is walking at best. If I try to do anything more than this I become at risk for feeling irregular heart palpitations and become even more out of breath.

-There are moments when I feel a little better and worse throughout the day. It is completely random but I think it might also have to do with eating. The only time I feel ok is when I am sleeping and I just wake up. Usually I lie around for a bit because it's nice to forget about it. As soon as I get up the difficulty breathing starts. If I get up just to use the bathroom at night it takes a while to stabilize after I lie back down.

-I have a chest pain on my left side. is right in the left pectoralis major. This pain never goes away however it is constant so I have coped with it. The
pain is like the pain you have when you have gas. It is a sharp pain I cannot move the muscles on my left chest otherwise it will feel like I'm being stabbed.

-It is common for me to be sitting doing nothing and feel strange heart palpitations which cause me to have even more difficulty breathing

-When I feel the palpitations (which have been occurring less but the chest pain hasn't subsided) It seems that my heart is in my throat or that I am going to burp up my heart. When This happens I have to lie completely still and focus on not passing out. My limbs, stomach face all go numb and start tingling like when your leg falls asleep and it's waking up.I usually sleep on my right side because sleeping on my left side causes difficulty breathing.

-I can't stand in one place for very long otherwise I will have considerable difficulty breathing and start to slouch, however I can get by walking.

-Sitting up straight makes it harder to breath. Slouching has helped me to get by and breath more easily.

-Riding in any vehicle causes me to have considerable difficulty breathing. It feels like the bumps on the road cause me to not be able to breathe well.

-Anxiety does cause my symptoms to worsen and my breathing to become considerably harder but it is not the underlying cause. I cannot run away from the chest pain or difficulty breathing no matter how calm or relaxed I am.

I have done a few heart and lung exams:

*3 ECG/EKG- nothing
*3 chest X-rays- nothing
*1 chest tomography- nothing
*1 Echocardiogram- nothing
*1 24 hour holter- nothing( I wasn't even able to

sleep within the 24 hours at any moment because I had to hold my cat who had surgery and took the whole night to recover from the anesthesia. Worst night of my life both of us suffering and nothing I could do. I left my cat with my wife when she woke up and went straight to the lab to remove the holter device.)

*Spirometry- nothing
*Laryngoscopy- Septal deviation(I've always had)
Rhinitis, pharyngitis and laryngitis

-the only day in the past 4 months that I have felt normal is the night of and day after I did the spirometry and laryngoscopy exams. I took anesthesia
in both nostrils for the laryngoscopy and 2 sprays of an inhaler for the spirometry exam. I started doing some exercises on the following morning and all
the symptoms returned.

-I am beginning to have dizzy spells. I suddenly get overtaken by strong dizziness.

When I was between the ages of 10 and 16 I had taken all sorts of antipsychotic medicine such as Geodon, Abilify, Seroquel and others because I was considered overactive. I am do worry that this might have affected my anatomy at a growing phase in my life. I have suspected heart arrhythmia or asthma but the tests I listed above say otherwise.