Bikes can take a good deal of abuse, but potholes can be that. Your hands can take a beating also.

In addition to the above, check your headset for brinelling. A good slam can cause an indentation in the races of your headset. Pick up the front end of your bike and pivot the bars back and forth. If they don't swing smoothly and freely, but feel like they have a notch or hiccup in the swing (probably when the wheel is straight forward), you may have brinelled your headset. If so, you may want to take to the LBS.