I had unprotected sex on Saturday and My period started on Monday (the day that it was suppose to start), I am on schedule on the day my period is suppose to start and I am regular. I was told that in this case I didn't have to take the morning after pill. Do I have anything to worry about being pregnant?

Normally if you have your period. At times, you can have the first period this early, or it may start and and end in two or three days if you are pregnant.

But the odds are really against you being pregnant. And to be honest at this point the morning after pill has less chance to work if you waited this long.

But if my period came on time and my flow is the same then are my chances that I'm not pregnant is my question?

Since you had sex right before your period, and your period came on time, it is unlikely that you would be pregnant.

Possible, yes, if you happened to ovulate well outside the norm... but very unlikely.

Best to avoid anymore unprotected sex to lessen the chances even more.