I have to agree with geminigirl...if you are feeling unwell still after 4 days you really need to see a doctor. I made that mistake. I was in a car accident and I was not wearing my seat belt and my airbag delayed when it came out and I hit more steering wheel than airbag after I hit the steering wheel then the airbag came out and whipped my head back. My car went over an embankment head first into train tracks but instead of calling the cops or anything I actually came to and drove my car home, somehow lol. It was totaled and the frame was bent. But I never went to the doctor and about 3 days later I was going out with a friend of mine and I wasnt feeling too well when I got into her car that is the last thing I remember. Luckily, my friend was a nurse and knew what to do because what happened was my brain swelled and I went into convulsions in her car. The only thing I can remember from that is waking up in ICU about 2 days later and i was freaking out because I couldnt talk or get words out. My doctor said I was very lucky it was just my speech that was affected I had to do therapy for that and a little bit of cognitive therapy I really regret I didn't go to the hospital when it happened because I have brain damage that got worse because of not getting treated so I recommend you go
Any head injury should be checked out, especially one that is still giving you symptoms after 4 days. DEFINITELY go see the doctor!
a few years back the same thing happened to me but i felt fine right after only a slight headache this was wen i was 12 im now 16 and have been okay although ive had migraines for awhile to and the heavy head but apart from that im fine however if it really does bother you see your doctors they can give u something to feel better.