Here me out , no negativity please

I've been a pack day smoker for over 10 yrs.

I am 18 wks pregnant with twins an I've cut my smoking way way down. Each day is a challenge.

I'm babies are most important an first priority of course. I don't continue to smoke because I want to be selfish it's a real addiction an I'm trying my very best to change.

Since I've cut back an the further along I get the most severely constipated I become. I smoke an I need to go but by the time I make it to the potty it's more like a trick .

I don't know what to do, I get stressed out an over guilty because I continue to smoke I'm so uncomfortable cuz I'm constipated .

I really need to positive advice.

This is my first pregnancy,all I've ever wanted . Promised myself I would quit if an when I got pregnant ,just need to prove myself I can !!! Thank you in advance for those who are helpful an positive.