There's nothing wrong- that's the way ejaculate is. It is useally whitish but can have yellow in it if there was any urine in your urethra. Don't worry about it- it's normal.

I'll be perfectly honest with you, when I was about your age (a LONG time ago), the same thing happened to me... once.

It freaked me out, but there was no odor, no discomfort or any other signs of trouble... and like you, I had never had sex before so not a whole lot of chance that it was an STD.

That was the one and only time I noticed this and since then I haven't had any problems or reasons for concern... everything works as it should. If you are experiencing this regularly, you might want to visit your doctor and ask for professional advice, just to be on the safe side.

Take care of your willy, you'll need him later in life.