Help! I can't ejaculate!! 10 points!?

Two or three days ago I ejaculated for the first time. I'm fourteen, pubic hairs, growing, and my voice is getting deeper I think. It rly suprised me because I wasn't expecting it. My penis began to twitch a little and I couldn't hold it back. It was a little yellowish and I kind of oozed out at the end. I tried masturbating today and for an hour. Nothing and I felt some good pleasure. Any help?