A street dog tried to bite 4 month ago.

Four months  ago in March  a street dog tried to bite me but nothing happened to me there was no blood no teared skin and no scratch but as it happened 4 months ago I don't remember that whether I already had a tear in skin already present in that area or not .and now I am getting scared that I will die of rabbies. I don't know about the street dog but at that time I didn't took any vaccine. Now this thing is strike me everytime. On this June I took 3 dose of Anti rabbies injection and one dose of tetnas as my pet dog bite me . I am really scared with incidence with street dog it looks that I will die . Can I take vaccine against rabbies to prevent it will it be able to prevent rabies completely as it's too late to get vaccine since encounter happened 4 months ago if I am in incubation period will it prevent rabbies if I take vaccine now please tell what to do??