Sir I was riding towards my way to the office on red light i stopped a car came from behind was coming didn't use break their bumper was scratched and they hit me on my head with something i couldn't see no vomiting no blood no black around I witnessed only head spin and dizziness for 1 -2 mins only but since the I'm continuously fearing having a little headache plss help shall i go ahead with ct scan ?or I'm safe?