Right, you obviously know that smoking is bad and already feel guilty. So, helpful tips.
I used pregnancy sickness to my advantage, in that I had nausea and vomiting from 14 DPO and as soon as I got the positive test, I couldn’t face the cigs. At 18 weeks I’m guessing the nausea has abated, but if there is a resurgence, or you get a stomach bug, seize the opportunity to be repulsed!
This is gross, but try collecting some dog ends and putting them in a sealed jar with a bit of water. When you crave, open the jar and take a deep breath of the unbearable stench within... Still want to smoke?
Try painting your nails. And let them dry properly - no sneaky cigarette which could mess up the polish.
Practically, as PP have said, you need to ask your housemates to refuse to let you have a drag. Especially DP! He needs to step up and protect his baby in the same way that you are trying to do.
Oh and do switch to the gum or inhalator to quit. You could be off everything containing nicotine within a week or two!
For reference, I smoked 10 per day for 10 years, and my husband 15 per day for 20 years. He quit two weeks after me, because it’s his baby too. I would urge your partner to reconsider his choices... can he come with you to your midwife appointments?
Best of luck!