I just started birth control its going to be a month in 5 days and I'm on the inactive pills right now I had sex the third week I was on it without protection when am I suppose to get my period

When I was on birth control pills my period always started the second or third day of the inactive pills; however, everyone is different. Don't be worried if you don't start the same day you take your first inactive pill.

Also, take note that birth control takes a few months of correct use before it's 99% effective. Before you have been on it for at least 2 - 3 months you might want to consider additional protection.