Have you ever came out as something, and realised you're not?

I came out as lesbian a year ago. Some of my family were very supportive, some acted supportive to my face but behind closed doors they said I was just doing it for attention.

Now I have realised that I actually can be attracted to guys to, so I think I'm bisexual. I'm scared if I come out my whole family will think those family members who said I wanted attention were right and not take me seriously.