I wouldn't worry so much, your only going to stress yourself out over it then that's gona cause you to be late on your period or something then really freak you out, just be calm wait for your period then start the pill :)
The morning after pill only works within the first 24 hours to my knowledge. You can start birth control pills, but I would wait until after you have your period at this point. You could check and see if there is a 3 day pill out there, but if your partner used a condom the likelihood of pregnancy is very low.
well yes u can take birthcontrol its not gone hurt of u not a virgin or not