Don't know what i should do if i think i have a concussion and can't see a doctor?

Don't stay alone: The problem with concussion is if it turns out to be more serious injury and you end up loosing conciouness later due to complication such as swelling or bleeding in head so if sometthing happens having some one near by will help to call for the ambulance etc severe unrelenting headache and vomiting are signs to look for to call ambulance.