FTM and I get it now

Hear me out hear me out. I’m not pro or anti vaccinations BUT after having my LO is it possible that a baby can change overnight? One day thriving, hitting all the milestones, laughing, curious about their new world, and suddenly it changes after a round of vaccines? Overnight? TRUST ME, I use to be one of those who would say, you gotta do it because times of changed or it’s for them to stay away from diseases but vaccines are just as scary as well! This also isn’t a political post, I’m not left nor right I’m just a concerned ftm. Also, why when you ask doctors or healthcare works your questions about vaccines they are quick to shame you? Like okay so I’m just supposed to trust you and you look down on me because I have questions? Suddenly it’s a red flag if I have questions??? Because I’m questioning the system? So, it’s a no questions asked thing? How? This is my baby’s health? If it’s “safe” why is it so taboo to ask questions about the vaccines? Or show concern?