It'll probably be confusing for the same people who took issue with bisexuality...but there are many people out there in the queer community who have no problem understanding why a person chooses to identify as pangender or pansexual. It's just a matter of breaking out of the homonormative community and finding those with a more inclusive outlook. Good luck!
And yeah, if you can definitely try support groups. Might also give you tips on finding events and stuff.