When able, it is important to write down any details you can remember, the sooner the better, as the accident will still be fresh in your mind. You may remember details, that later could perhaps be forgotten.
Shortly after an accident occurs, you may not be feeling any pain, it is very possible that you are in shock and your body has not recognized the fact that you are injured. Often times, you may have suffered an injury, but the pain does not show up for perhaps hours later.
It is imperative that you seek medical attention in a timely manner. Florida statute requires that you see a physician within 14 days of your accident. The sooner your injuries are documented the better off you will be.