You probably should not be relying upon your family doctor, or an internist, unless they have extended experience with collision cases. Personal Injury attorneys know which doctors to use and which to stay away from. This means you get to obtain necessary medical care without paying the doctor up front, or as you go, because the attorney agrees to pay your bill to the doctor once your case is settled. Without the attorney's promise, you'd have to make payment arrangements yourself. Keep a diary to document your injuries, and the things you cannot do.
Few people remember details for very long.
By the time you get ready to try to resolve your case, the fact that you couldn't sit at your computer longer than 15 minutes for the first two weeks will be forgotten. The fact that you couldn't sleep peacefully for a long time, and that made you irritable will also be lost. Your diary should be honest, and complete, without over-reaching. They will use anything and everything they can against you. Even a small lie can ruin your credibility.