Stop smoking and vaping immediately and the damage they have done to your lungs may heal in time or at least not get worse. If you have to get high use edibles and if you have been vaping nicotine the gum can help you wean off it. Young lungs are usually resilient but some people are genetically predisposed to the diseases brought on by bad habits that usually take years to develop. Seriously, stop now and if your breathing doesn't improve in a day or so or gets worse call a doctor because you probably have pneumonia and need antibiotics. Your description of not being able to take a full breath may be because your lungs are filling with fluid from infection.