Aw, bloody hell!

So, here's the situation:

I've never had an attraction to girls (as far as sex is concerned), and I find myself attracted, both mentally and physically, to the same sex. I've pretty much accepted that fact over the last few years. I've tried to come out to my parents yesterday, in fact. The problem is - I couldn't open my sodding mouth. In fact, I've been stressed out by this so much, that I went to sleep immediately after and felt physically sick ever since. And I'm certain that they won't reject me, since both my parents have stated before that they have no problems with gays whatsoever. Hell, they might already know, since I've been pretty outspoken about gay rights and my hatred of the church for rejecting gays. So why the hell can't I bring myself to come out? How should I go about this?

By the way, I'm pretty concerned about the political situation of my podunk little home country of Poland (with the ultra- right wing slowly but surely rising to power, I might have to run away to
Canada or somesuch in the next few years) goddammit.