How can I check my breathing at home?
To perform pursed-lip breathing:Relax your neck and shoulder muscles.Slowly breathe in through your nose for two counts, keeping your mouth closed.Purse your lips as if you’re about to whistle.Breathe out slowly and gently through your pursed lips to the count of four..
How do I test my breathing?
One type of lung function test is called spirometry. You breathe into a mouthpiece that connects to a machine and measures your lung capacity and air flow. Your doctor may also have you stand in a box that looks like a telephone booth to check your lung capacity.
What does it feel like when your not getting enough oxygen?
Dizziness, lightheadedness and/or fainting spells: Feeling dizzy or lightheaded and/or fainting is a common indication that your body is not getting the oxygen it needs. A floating feeling or feeling the frequent need to yawn may also occur. 
Why do I feel like I can’t get enough air through my nose?
Turbinate tissues can swell due to allergies, colds, infections, or hormone changes and result in the feeling or a blocked or stuffy nose. Severe swelling can cause an obstruction of the nasal airway and make it difficult to breathe through your nose properly.
Why do I feel like I have to sigh all the time?
Excessive sighing may be a sign of an underlying health condition. Examples can include increased stress levels, uncontrolled anxiety or depression, or a respiratory condition. If you’ve noticed an increase in sighing that occurs along with shortness of breath or symptoms of anxiety or depression, see your doctor.