### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Ive recently had a sinus inffection my doctor told me and that cleared up because my breathing got better, but about few days after i was feeling fine i had a lack of oxygen feeling and that went away a while after but now im having heart and breathing problems again at night when i lay down my heart is beating hard normal pace it seems but hard and i can feel it in my torso area kind of shaking feeling slightly but mostl just hard feeling and it keeps me from going to sleep i can only feel this when im laying on my stomcah when on my back it feels fine and also it seems when i walk now my breathing feels shaky when i walk and almost like a lack of oxygen feeling but mostly a shaking feeling i smoke on and off but havent smoked since a few days ago

### output:

Thanks for your question on Chat Doctor. I can understand your concern. Sinusitis is upper respiratory tract infection (URI). Bronchitis is very common after URI. And bronchitis can cause similar kind of symptoms like palpitations, breathing difficulty, feeling of lack of oxygen etc. You were also smoking and bronchitis is common in smokers. So better to consult pulmonologist and get done clinical examination of respiratory system and PFT (pulmonary function test). PFT will not only diagnose bronchitis, but it will also tell you about severity of the disease and treatment is based on severity only. You will mostly improve with inhaled bronchodilator and inhaled corticosteroids (ICS). Don't worry, you will be alright with all these. Quit smoking as soon as possible. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.