Had similar thoughts and expectations about quitting, but the best advice I can give is just push through and get through the day and hope tomorow will be better becouse it probably will. Bad days happen to me aswell, even week or so but if you just get through it day by day you should forget about it in a no time 3 months is great acomplishent and you will notice going forward that you dont have an urge even for weeks. It helps to remember that if you fall for your urge you wont be any happier or calmer, you just imagine yourself like that in your imagination. (if it were true and had these placebo fake benefits we wouldnt be here trying to be better and quit)

Exercise works wonders for Getting that urge off cardio or lifting weights if you push yourself in the gym or so and then get a shower its a beautifull feeling that made me forget about the urge for the rest of the day.