Already craving again

De
My baby girl is 17 days old and the last few days I've already started craving cigarettes again and want to smoke. I feel horrible because I was hoping after not smoking for 9 months that I would be fine and stay not smoking. Never did I think I would so soon want to start again. I've taken a few puffs and am tempted to go buy a pack but haven't. I know it's not the worst thing in the world but I'm so incredibly paranoid of anything effecting my breastmilk. Which brings me to my next terrible craving- marijuana. I have a medical prescription for it, I didn't smoke while pregnant cause my BD didn't want to risk it effecting the baby since there wasn't enough research to prove its okay. Which the same goes for smoking it while breastfeeding. Part of me feels it would be better to smoke than to keep popping ibuprofen like skittles everyday though. I have horrible back problems and anxiety which is why I would smoke. But I could never forgive myself if it somehow negatively effected my beautiful baby girl.