Parents who let their kids run wild

I hate when parents allow their kids to run crazy in public! I'm at the Drs office and this mother is literally allowing her sick kid to jump on me as she laughs, I'm clearly pregnant why would a parent allow their kid let alone sick kid, to be all over me. I want to say something but I don't want to be rude. I wish parents would control their kids!! I feel like pushing this kid off me 😣