what you're saying is really resonating with me..i, too, think i've had anxiety issues for most of my life, but didn't get diagnosed until i was in my 20's. i had several years where i was just fine, but over the past year or so my life has been terribly stressful and my a/p has come back with a vengeance. i also have fibro, and agree with you that the over sensitivity that comes with fibro (people, noise, heat, lights, etc) make my a/p worse.
looking back on my life, i also have to wonder how different things would be if i'd been diagnosed as a child. of course, considering the things i went through as a kid, i don't know if being diagnosed would have made much of a difference. i think that those of us who struggled with anxiety and panic as children are made to feel so weird-we don't fit in, or we don't feel like we fit in because we get nervous and worry about things that none of our friends seem to worry about. i think that can make us feel very isolated and lonely (or at least it did in my case) which can create a situation where we start to turn towards unhealthy things to get us through. for me the coping mechanisms have been keeping everything bottled up and being super responsible (which i wonder if might have caused my fibro in the first place) and also food. i've struggled with emotional eating for as long as i can remember and it's still something i have to fight against on a daily basis. for others, coping might mean turning to alcohol and drugs, or shopping, or sex, or gambling or angry outbursts. everyone is different in how they express their feelings of childhood isolation, but i think it all stems from the same thing.
i don't know..i am not a therapist, but i do have to wonder about this. i'm sorry for rambling, but i did want you to know that you are not alone in your feelings.
love and hugs
this being human is a guest house.
every morning a new arrival-a joy, a depression, a meanness,
some momentary awarenewss comes as an unexpected visitor.
welcome and entertain them all!
even if they're a crowd of sorrows, who violently sweep your house empty of its furniture,still, treat each guest honorably
he may be clearing you out for some new delight. ~rumi