Thanks for posting on HCM,
I suggest that you immediately go to the hospital to get that checked as soon as possible. We do not know for sure if it is an intentional act to transmit an unknown diseases to you or not. It might just be a pointing object on the bus entry that you could have accidentally touched it.
You should meet a doctor and describe the scenario to him and let him decide on the next step to take. No blood tests will likely come out positive as regarding the incident (since we are not even sure of the needle being contaminated).
I for one will give an antitetanus serum (if you are not yet received full vaccination
). Your HIV
serology tests could be done, to rule out the fact that you might as well be an HIV carrier (without knowing), then the tests repeated after 3 months to confirm if you are free from HIV.
For now, keep a calm mind and hope for the best outcome.
Hope this was useful