Serious Question ab Pregnancy!

So... I used to smoke a full pack and a half cigarettes a DAY (my work is involved outside with my husband and we worked on general construction together, me blueprints mostly & Measuring) anyways, I found out I’m 4 weeks and 3 days pregnant... and it’s getting so hard to not smoke. Would be horrible if I had one cigarette? I do NOT plan on smoking a lot and no more than 2 a day, it’s just so much harder on my body to not smoke at all😭 everyone is saying it’s BETTER to stop completely... but I really really don’t know how to just yet, especially since I can’t vape nor even use nicotine patches 🙄😭