Get an excellent vaporizer you don't have to get a volcano. IME the magic flight launch box is good but everyone has their own preferences about vapes. Fuckcombustion.com is an excellent site to learn about vapes on.
Avoid the cheap box clone vapes that are very cheap that you see on ebay they don't really work and they're made with materials you don't want to be vaping with. I never have used one but a friend of mine did and said how his does not even vape that well or correctly.
Edibles also work but just use low quality or mid grade stuff.
If you smoke cigarettes, cigars, pipes or tobacco, or you use dip/chew quit that. Don't smoke blunts either.
Also get more into cardio exercise. Even if it's just walking a lot daily, biking, or running/jogging for a few times a week for at least 20-30 mins.
Drinking tea may help since that is supposed to be good for your respiratory system. Ginger also can help some people.
You may also want to see a doctor or a medical professional.
Good luck.