Any Suggestions To Why I'm Having 2 Years Of Right Lower Quad Pain After Car Accident?

I was in a car accident 22 months ago. 1 week after the accident I started having pain in the right lower quadrant. I have been to a obgyn, fertility specialist, gastroenterologist, hemotologist, oncologist. I have had multiple tests and everything has come back negative. I went to a chirpractor in Aug and he said that I had a misaligned pelvis. Could that have anything to do with it? I need some answers because I can't find anything on the internet since I'm only having one symptom.