After taking the morning after pill, and then getting period 7 days later.. with that period lasting about a week. When should I expect the next period?

it can vary from a month to 6 weeks...

Hey, at least you know for sure you're not pregnant. I wouldn't worry too much about skipping periods or not if you're concerned you might become so and not know.
But yeah... try to be more careful in the future. It's a lot safer and easier in the long run.