"vaping and a smoke once or twice a wk"...I don;t think U quit. Total abstention for 2 wks might have the "I quit" claim - if not picking up ever again...
Use every trick available. Have U ever quit B4? How long? Exceed that this time. Dont give up giving up smoking until you have a 1 yr anniversary (total abstention). Then one can relax a lill, but not much. The longer away (totally) the easier to not pick up. Often, however, that can also B chancy ("I have been pretty successful. 1 wont hurt." and then back on for the unknowable future).
Every cig/nicotine U have reinforces the addiction, re-introduces it to the body, begins the w/d again. U dose w/each use, when gone it re-doses U w/the desire. Stop once, go thru it. Do not 'reinfect' w/it again and the w/d diminishes...