As you can see, the research is inconclusive regarding the link between smoking while breastfeeding and colic, but there may be an increased risk, and especially if you smoked during the pregnancy too
Myers, President, Campaign for Tobacco-Free Kids WASHINGTON, D.C
The health effects of passive smoking: an overview of systematic reviews based on observational epidemiological evidence
Here is a list of some of the chemicals found in unfiltered cigarette smoke besides carbon monoxide: hydroquinone, methacrolein, methyl alcohol, methylamine, nickel compounds, pryidine, carbon dioxide, crotonomitrile, dimethylamine, endrin, ethylamine, furfural, cadmium, methyl nitrite, ammonia
For example, children of parents with lower educational attainment may have reduced access to accurate information about the harms and benefits of vaping, while also being more likely to be exposed to secondhand smoke and nicotine product use at home [64]