i understand what you mean. i'm 47 and have 7 kids. if my parents or other relatives have/had anxiety/panic issues they certainly never shared it with me.
However, i do believe i have passed it down 2 a couple of my kids. Social anxiety, anxiety attacks. i can tell its real and not them making it up, but they also are old enough 2 know that i suffer daily.
i'm not sure if its medically been diagnosed but in my case i do believe there is some passing down to them.
Glad you brought up this subject but i am sorry your child is struggling with this as well. Best 2 you and your family.
Bipolar 2, Borderline Personality Disorder, Anxiety/Panic Disorder, PTSD, OCD, Depression