Took emergency conterception on aug 5 period came a week earlier aug 9 & lasted a week longer aug 28. sex on aug 30 & sep 7 & 8. could i be pregnant?

Always a chance: I always recommend that women who choose to be sexually active choose a consistent birth control. Even with taking birth control, you are willing to become pregnant when sexually active, since ALL birth control have a failure rate. You are most fertile 14 days before your next cycle starts which should be about 2 weeks after you start. There are natural family planning apps if you choose no BC