Even if you aren't showing symptoms, it is unwise not to get checked out, especially after an accident. Often times in an accident, you are forced to go to ER at the time of the accident (usually for insurance purposes).
Considering the amount of accidents you have had, you are being reckless with your health, because who is to say you won't feel fine tomorrow? I think you are playing a very dangerous game to not go just because today you feel fine. You asked everyone for their thoughts, they have all said get checked out, and you are just choosing to ignore really good, potentially life saving advice. *just my two cents*