Michelle,
I have not been dx'd yet, but saw a neuro and on the path to find out what everything is. I suspect possible ms. I have my first MRI today.
But I know EXACTLY what you are talking about. I have ALWAYS been like that. My cat can stand on my lap and thighs and it will about kill me

, or if I bump into something. Also, if I'm touched on the top of my hands with too much pressure, it hurts just as bad. I never could play that "hand slap" game the kids always played!
If I scratch an itch, esp on my thighs, upper arms, or on my back it hurts really bad and is sore like you described.
I'm interested too if any dx'd ms'ers experience this. I am dx'd with a whole host of other things, fibromyalgia being one of them and I always considered that too be the reason I do get this oversensitive soreness.
Take care and hope this helps. God bless.
Michelle