I fell off a horse 4 weeks ago. i went to er that day and had x-rays taken. x-rays were clear but i still have severe pain. should i have it checked?

Persistent pain: You don't say precisely what area you injured, but if you are still having pain 4 weeks out it would be wise to be rechecked. If it was concern for a broken bone, a hairline fracture may not show on initial x-rays, but can show up subsequently. If it was a joint, then you may have ligament and/or tendon injury that would not show on x-rays. In any event it is time to be re-checked.

Horse: Not clear where the pain is. Pain should have been decreasing. If its still severe then please see a doctor.