Neck injury... won't heal!

About 8 months ago, I head my head jerked to my left side and had bad neck pain after that. I started going to a chiropractor, and it helped a lot, but the pain never went away.

Now the other day, I got hit in the head again, with more of a downward motion and my right arm got numb for about 10 seconds, then the pain went away. Now the naggin pain is back and I get a little tingly in my right hand every once in a while.

I don't really know what I'm asking for. I just know the chiropractor just said to give it time, but I'm worried I might have damaged something inside worse than he knows. Does it sound like I should get a 2nd opinion?

Thanks,
Jason Tweet