Thanks for writing your query.
After reading your post, it seems that you might have suffered from concussion injury
. Other possibility can be that your neck muscles have been strained as a result of the impact, leading to your symptoms.
Blood clot seems unlikely. Still you should get yourself clinically examined and investigated.
A CT or MRI
of head and neck will be helpful.
Complete rest will quicken the recovery.
You can take painkiller like Ibuprofen
twice daily after meals along with an antacid
40 mg once daily and Domperidone
10 mg for relief from your symptoms.
I hope this is helpful to you.