Your name reminds me of an old group I used to listen to: the Mahavishnu Orchestra. Mahavishnu Orchestra - Birds of Fire (full album) (VINYL) - YouTube I used to play in a marching band too - the flute. Not easy to play and march at the same time! Kudos for that.
You say you "think" you've already quit but aren't sure. When you quit - you don't vape or smoke again. Quitting isn't a part-time thing. It's an EVERYthing.
Just because you can go without it for weeks, doesn't mean you not addicted. And this is you clue: "when the situation presents itself, I have a hard time saying no." So yes, I'd say you're an addict in the sense that you've created new nicotine receptors in your brain that weren't there before and so when they get triggered you have that hard time saying NO. It's a habit too, of course, a behavioral and psychological one.
Do you need a doctor or a rehab center to get over it? Based on my personal experience I'd say no. Just hang out here and read what we all have to say. You'll find that most of us say the same thing (in different ways). Commitment, hard work, education, persistence, etc. Those ARE the ingredients necessary to beat this addiction.
If you make quitting a priority in in your life, I mean really spend as much time and effort and reading and practicing as you do with your trumpet, I've no doubt you'll succeed. If you really want to make sure you never do it again - that's what it takes. You up for it?
