I was wondering, if i have whiplash, is there any dangerous injury?

Not usually: Though whiplash can be very painful in the first several weeks, it is a self-limited condition that responds well to noninvasive measures such as physical therapy. With whiplash, there is no need for invasive measures such as surgery or spinal injections.

Too vague, too soon: It is difficult to answer such question without a thorough history, exam, possible x-rays and/or a mri. The type of collison, severity and speed of impact, and your position in the vehicle are all needed to get some clues. Your symptoms may change within 24 hours or even several days or months. Should see a doctor asap to evaluate.