unable to get emergany contraception

i had unprotected sex the other day and wasnt able to get the emergancy contraception when i planed ! as the phramacy said she wasnt qualifed to give it out to a 17 year old ! when i had got it from that store before i now wont have time to get the pill within the time it ahpuld be used ! my period is due with in a week and the app says 3 percent likley  but if it doesnt come wthin 5 days does thay mean i wont be preganant !?!? and what shall j do now ! many thanks to all who help