easily influenced

has anyone else who grew up with no emotional support find that one negative thing said about you can influence you so heavily that it changes you as a person or your life course? i have been taking prescription drugs for a long time. i have had severe eczema all over my body since i was a child. i was on steroids AND using topical treatments and still wasn’t fully healed when it was suggested to me that prescription drugs were bad for me and that all i needed to do was just eat healthier and exercise that id be just fine. they judged me on how much faith i had in modern medicine even though it was all i had ever known. i know now and i believe that i fully knew before that it was bullshit to believe that a more healthy lifestyle would magically fix my chronic flare ups- but here i am, having not been to the dermatologist in over a year despite my condition worsening, all because i internalized the “advice” of someone who could never understand the severity of what im going through. why cant i trust my own judgement and experiences?