I really do not want to be combative, but there are some things I do want to point out to you.
First of all YOUR genetical make-up in its totality perfectly fits the bill of the ethnic group "African American", it is a very typical result for "African American", your personal DNA is not that of "Melungeon" people, nor is your experience growing up that.
So it would be really weird if someone could actually see Melungeon in you when you don't have the proper admixture of racial ingredients. Anybody that thinks I look Nigerian, I don't take him seriously, because I simply do not. My genetic admixture is absolutely atypical for a "Nigerian". Every ethnic look essentially is made up of a certain melange of ingredients. And you yourself do not have the proper proportions of ingredients to be Melungeon. From what I read, Melungeons could actually pass as white or native, which you could not.
And looking Haitian does NOT equal looking Melungeon. The typical Haitian look is 85-95% black, Haiti is known to be the only true black nation of the Caribbean, because they killed off almost all the whities over there. So when somebody says you look Haitian, they probably think you look very very Subsaharan African and not "tri-racial", what Melungeons essentially are, who I am sure form a little minority in Haiti, and people do not think of when thinking of Haitians.
So you might have Melungeon in your family but neither genetically nor culturally, do you fit the bill. Matter of fact you perfectly make up the unique and intricate admixture of "African American", splashes of white, native, Creole/Melungeon, and a whole bunch of West African. And that is also your culture, African American. Now if you really want to travel to these places where Melungeons today reside, talk to them, learn the habits, culture, proverbs, cuisine, and then figure out if this is really who you are, I believe, THEN you can talk about claiming stuff.
For right now it should be a little sidenote, not a the main headline. If we are being pedantic and consqeuent.