It can be like this even when you are 18
Wow. A lot of judging and misinformation in reply to your post. I didn't really expect so much of that on Lemmy.
If you've got ADHD or a schizo-affective disorder, nicotine seems to help with anxiety and focus from those conditions. More than the nicotine, the act of purposely inhaling anything causes you to focus on breathing (even for a short time) and when anxiety is running you, your breath is key. Now, that said, inhaling anything in concentration is not without risks. Some are way, way worse than others. Vaping is definitely on the low end of the risk category. Smoking is strongly on the other end.
This is something that seems to be missed by many commenters. Prescribed drugs come with many risks as well. Societally, we've accepted that treating some of our issues are worth these risks. Weight gain, weight loss, bowel issues, sleep issues, lack of focus are common issues across the spectrum of anti anxiety drugs. And then if or when those symptoms get bad enough, you get another med to counteract the drug symptoms and those can affect kidneys, blood sugar, energy levels. Just because you're prescribed something that has been deemed safe doesn't mean it isn't doing damage to your body. It's all a trade-off of happiness vs health to some degree. That doesn't mean you shouldn't take medication if you deem it necessary. The side effects are probably worth the change you're needing. And it doesn't mean you should vape even if you think it helps. But be as informed as you can while being as happy and healthy as you can. That's all you can do. There are things in life a lot worse than nicotine or Wellbutrin that you don't get a choice over. I wouldn't fret about them too much.