We actually don't recommend using any of our products while pregnant. Thank you for taking the time to voice your concerns today.— TYLENOL® (@tylenol) March 7, 2017
Tylenol has already changed the labeling on their new packages:
https://www.google.com/search?q=warning+labels+on+bottle+of+tylenol
[also, by bottle of generic acetaminophen already contains a warning label not to use acetaminophen without consulting a doctor.]