Light period after morning after pill, is this normal?

I had unprotected with my boyfriend on the 9th may(sunday). the monday before hand i was late taking my pill as i didnt take it till tuesday, it was day three of my second pack of pills( i ran two together) so i secided to get the morning after pill the monday after the unprotected . i finished my pack of pills and finished them friday just gone. i got my period monday and it is light enough, but i had cramps. it is day 3 now and it is very light. i never get heavy periods as such as i am on yasmin pill for over three years, and my period is usually extremley light by the fourth day, i am just wondering is a light period normal after the morning after pill.