Thanks for posting your question and I'll tell you there's no perfect answer to any question you have.
You state that you have feelings for both genders and you ask if it's wrong? Do you think it's wrong? Because if you perceive it to be wrong then it's wrong (perception is reality).
The majority of society will say anything but heterosexuality is wrong. I respect that view though I strongly disagree with. Members of the gay and straight communities will say you're one or the other NOT both. I DISAGREE.
Being bi, could put you and your partners at higher risk for AIDS and STI's if you don't always have SAFER sex.
There's simply no right or wrong answer to your question.
You ask how can get help. I'm confused by that question because it could imply that you're asking where you can get counselling. If I misread that I'm sorry!! I'm sure there are GLBT support groups or centers in your community. If there are, contact them. I'm sure health clinics can refer you to people that can work with you during this time of identifying your sexuality.
Coming out is a unique and complicated process and it varies on an individual basis. It takes time. I think you should be selective on who you tell.
Your fears of being disowned are NOT uncommon. However, it may NOT be case. Unless your parents are openly anti-gay or anti-bi, their reaction may NOT be that bad. I thought I would be disowned by my family. However, they supposedly knew about it beforehand and were accepting.
Hopefully, I didn't ramble on too much.
Before you come out to anyone, I again suggest that you get to know others in your situation and learn how to cope with what may happen