I'm not sure about the colour of it. I know it changes several times before birth. Clear, cloudy, whitish, yellowish, etc. Not sure in what order either. On a few occasions mine has been clear, then white. I really have no idea.
I don't get streams of it like you describe, but to look down and see a big spot on my shirt means that a lot must have been coming out.
I asked my doctor about it and she didn't seem concerned, especially that I was doing it myelf. She said if it starts leaking on its own closer to birth that you can loose colostrum and may need to save some of it, but if you express it it's not usually cause for concern.
So quit play'n with yer boobies!!