I had unprotected sex and took the morning after pill straight away, i then had my period a week ago and now i'm bleeding all of a sudden?

Fairly normal: When you have "disrupted" your normal cycle it is common to have irregular bleeding. It may take 4-6 week for your body to re-establish a predictable bleeding pattern

This is a know SE: The morning after pill is made to provoke menstrual bleeding. It is not unusual to have additional bleeding since it was likely when you started the medication it was not matched up to your regular cycle. Therefore, additional bleeding is expected. I strongly recommend you now start a very effective birth control method. Better to prevent than have a scare. It is also a good idea to get a pg test.