Need to smoke

I know I sound like a bad mom but I have been smoking weed since I was 20 and when I got pregnant I knew I would have to stop but it's so hard I stopped at 19 weeks I'm now 24 weeks and I'm craving it so bad my mood is so fucked up and I'm stressed. I'm not going to start back but man 16 weeks is going to be hard. Ready for this to be over