Anyone cut smoking clean turkey and relapsing pregnant ?

Well I don’t technically think I’m relapsing but it is killing me not to be able to smoke… I’m wondering if it’s just a mind thing or why is it so hard to stop smoking but I definitely believe it’s easy for some others because they have more self control and maybe quite more disciplined than me… Its going on almost a whole week but I feel like I’m dying😩 if I can just stop for about seven more weeks when I deliver and I think I’ll be all right… What are some motivational tips or things I can do to stop thinking about smoking? By the way I don’t smoke cigarettes I was smoking marijuana I have never smoked anything else but weed, please no Judgemental or out-of-pocket comments. Just keep it simple