Is it normal to have irregular periods?

I had sex 5 days before my last period and when it came, it was normal. We used a condom and i did not let him "finish". I was supposed to start my period today but so far i haven't. Is this normal?Is it normal to have irregular periods?
We all have our own pattern in our menstrual cycles. No need to worry. It's on its way.
yes its normal........
Your period may be a day or two late, and doctors have told me that you can skip a period due to stress, dietary change, or weight loss or gain, but given the fact that you are sexually active there is always the possibility of being pregnant. There are many types of pregnancy tests you can purchase to try at home, but if you are really concerned i would schedule a doctor's appointment.
It is normal sometimes you don't start untill 1 or 2 days later there is no need to worry.
dont worry because if u do, that will just make ur period more late. just dont worry.
Stress can do that to you.
No woman's cycle is as regular as clockwork, not without help. However, just in case, buy an HPT kit. Wait until the instructions say that it should be used, and if your period hasn't started by that time, use it.