Quit smoking ttc

I don't usually smoke often, but this past year I've noticed ive picked up the habit hard. I used to beable to quit like it was nothing and I'm finding it hard to do so now. My plan was to quit as soon as I had a positive pregnancy test, but I decided given my past experiences with pregnancy (one d&c one miscarriage) I should probably be as healthy as I can be from the start. So basically what did other smokers do to help quit when ttc? I've gone 3ish days, only smoked 1 on sunday, but can feel the urge to buy a pack and smoke like 5 in a row...