Mine was especially bad. I was 19 when I started smoking, and shortly after was informed of something. My mother has a sort of lung disease where her lungs don't produce some sort of enzyme needed, and better yet, it's hereditary. At 40, the doctor told her that she had the lungs of a 90 year old woman, and that if she didn't quit smoking, she would die. Now, once a week, she has a nurse come to her house and insert an IV into her arm for treatments. So, at 20 now, hadn't been smoking for more than a few months, I was waking up nearly every night, hacking and nearly vomiting. I tried to tell myself that I was just getting sick, but that wasn't the case. Started vaping shortly after, and within a few days, everything completely cleared up, like magic.