OP, do you feel like your reactions are rationale?
I get the impression you came on here looking for others to say that it was entirely normal to be overwhelmed, which at times many of us get overwhelmed, but you reactions are way past that.
I think silently weeping to something that touches you is a normal enough reaction, but full blown crying and worse screaming/wailing is very bizarre.
Were you not mortified by being escorted out?
What culture are you from? I suppose some cultures do display greater degrees of emotion.
Do you actually know someone who died on 9/11? most of us remember that event and I'm sure we are all deeply saddened, but do you not see that your reaction has nothing to do with that event and more to do with demanding attention?
Why is your husband even still going with you to placed where you make such a sceptical of yourself?
You're not a highly sensitive person, that's something entirely different, this is almost the opposite, this feels very attention seeking.
You give some indication that you do have control over it by stating why should you change, surely you change because you don't want to draw attention to yourself at such emotive places? If you are no control then I do feel for you, perhaps it's a good idea to visit your GP and get some advice. In the meantime avoid such emotive places.
I don't think you should be worried about a silent Tear here and there, but anything that draws attention to you and away from the event or other people's enjoyment of it is a no-no. Obviously, things happen, people faint or have nose bleeds or various other things happen that can't be controlled. But it sounding like it's just how you handle these experiences and it's not appropriate.
But, they have happened, get some help and move past them. Good luck OP.