You were detoxing off stuff in tobacco known as the minor alkaloids MAOI A and B compounds. Your best bet (if you can find it) is WTA (Whole tobacco alkaloids) which Aroma makes they are like more expensive than gold but worth it.
A cheaper alternative is some Swedish snus, it's called American General Snus, confusingly in the US but you can get it at most gas stations. It ALSO has a (I suspect a great many more) of the minor alkaloids in it, you could save it for those times when you are hyperventilating or whatever.
Nicotine is ONE thing we are addicted to in cigarettes, ONLY one, an I must say WTA saved my BACON when I quit this time. Snus is a ton cheaper and all I can say is I found the flavor "white" the least offensive but like it still doesn't taste GOOD but if you have severe anxiety/depression you likely will "learn to like it" in this pellet loving rat kind of way.
Also, give you a BREAK you are like, stopping one of the HARDEST things known to MAN. Anxiety is normal and you don't HAVE to go all black and white, all or nothing. If I had tried to stop my 3 ppd habit all at once I would have spontaneously combusted.
If you are vaping DL, maybe you need MTL and vice versa. The zenith tank is a good place to start lots of options for coils and airflow.
Hang in there, it gets better.
Anna