How often do you ejaculate? Abstaining for longer periods would probably allow for a stronger ejaculation. Either that or it may be a urethra problem. I wouldn't necessarily be too worried about it because flying loads of semen like you would see in the pornos isn't always the norm. If you're still worried about it in a few weeks, see a doctor.

Some men don't shoot, they just ooze. I've even seen it in porn.