I am sexually active and have been on the pill for at least a year now (levelin) I take my pill every night before I go to bed. Today I am due for my period and usually I wake up and when I go to the toilet I get it. Today I didn't. Although I am not technically late I am worried. Should I be?

Probably not, but pregnancy does sometimes happen even on the pill. Give it some more time and see what happens.