Please no judgement !!!!

Recently found out I’m pregnant and I am a smoker… the day I found out was Wednesday I told my self I would stop.. the next day i got a bit stressed from work nd I smoked again.. I told myself stop again… but obviously after being a smoker so long I’m craving nicotine a the slightest inconvenience .. not happy about it and I still haven’t smoked yet but know of anyway for me to alternate my craving toward something other than nicotine ? I refuse to smoke during this pregnancy but not smoking is making me irritable …anything?