Thanks for writing your query.
After reading your post, it seems that you had suffered from soft tissue injury
but still you should get yourself clinically examined and get a CT scan/MRI of head and neck done.
Sometimes concussion injury
develop due to head injury
and it takes few days to weeks for complete recovery.
Complete rest, both physical and mental is needed for fast recovery.
You can take anti-inflammatory like Ibuprofen one tablet twice a day after meals along with an antacid like Omeprazole
40 mg once a day before meals for relief from pain. Domperidone
10 mg will give relief from nauseating feeling.
I hope this is helpful to you.