Let me chime in and recommend snus (or any other smokeless tobacco, if snus is not your thing) as well. Snus itself has a proven safety record, and while not all of the others do, each one of them is better than analogs. (To be precise, each one is better than
any incompletely burned plant material that is inhaled.)
I find the idea of telling people to use ADs to quit smoking in this forum is a bad joke. Exactly how many here have tried that and failed? Lots.
ADs can be life safers. (They can also be killers, and not just Chantix.) I've taken them myself and I might take them again. But not to stop smoking. And that's not even discussing their side effects.
Upping the nic level is also a mixed advise: Worth a try, certainly. Many think now that they stopped smoking analogs, they have to do it all at once. Or they got bad advise. Too little nic means craving for analogs, most of the time. However, that does not mean that craving for analogs necessarily means too little nic. It does not. And a nicotine overdose is also not exactly pleasant, either.
BTW, too much nic does help at first, no doubt. The same way it helps when you are hungry: You don't feel that hungry any more, but that does not mean that your body is actually getting the food it needs.
Nevertheless, check your nic level, and check your hardware, too. Many, for example, don't manage with super-minis (no idea what the blu is), because they just don't produce enough vapour and throat hit.
Regarding snus (and other smokeless), check those threads for a start, but if you read through the forum you will find a lot more discussions of same question:
To snus or not to snus and
Is vaping all you need? and check out the
smokeless forum.