Morning after pill

Lauren

I took the morning after pill last Sunday (a week ago) and am not due my period for another two weeks however woke up to blood this morning and have been on a sort of period all day. I have never taken the pill before so dont know if this is my actual period just starting early or if it is just a short bleeding and will stop before I get my proper period? Is it normal to get a very early period after taking the morning after pill?