Not me, but in the span of a couple weeks I had some really awful experiences with pediatricians. My middle kid was almost three when they had a horrific fever and was complaining about a stiff neck, which is a huge red flag... But the ER sent us home with the diagnosis of "neck torsion." A few hours later we went to a different ER because they had a lump the size of a grapefruit in their neck from an infected lymph node. Required several days in the hospital to get IV antibiotics.

A couple weeks after that I gave birth to our youngest, and at her 3 day check up her doctor claimed to see sores in her mouth and was worried about herpes (despite the fact that neither me nor my spouse have any STDs) so she sent us to the ER... No one there bothered looking in her mouth until after a lumbar puncture. Then someone realized there were no sores at all, but harmless gum cysts that are extremely common in infants. They kept her overnight for monitoring and that morning a med student presented the case to her peers as a cautionary tale to verify symptoms before jumping into an LP.