Aw, you guys. I'm a little disappointed in ya all.
You shouldn't be so ashamed of who you are. Who you're about to become. Families are an awesome part of life, and I'm sure if you properly sat down with each of them (maybe not all at once) and just explained your situation to them, they would understand completely.
If they still think you're "weird" after that, then I guess your family never really cared much about you in the first place.