Instagram Username Help?

[Brody]

I want to use my first and last name as my Instagram username but when i type it in on my profile it says a profile already exists with wight that username and i can't use it. BUT when i typer it into the search thingy no profile comes up with that username
is there any way i can use the username i want ?
i tried an underscore between my first and last name and it didn't work either

[tyron]

Then just type you name with underscores in it . for example: if your name is James Dominic, type in _James__Dominic

[Winston]

How about just make a nickname or random word of some sort rather than using your first and last name. Like NameRandomword (eg: peterdabeast).