Missing Period on Lo Loestrin Fe

Patient: I started taking Lo Loestrin Fe last month, and finished my first pack three days ago. It contains 24 active pills, 2 white pills containing one hormone, and 2 pills containing only iron. There were 3 days in the 2nd or 3rd week where I was a few hours late with taking my pill, but I still took it that night. Today was the third day of the second pack, and I have yet to get my period. Is this normal, or is there a chance I could be pregnant? My boyfriend and I haven’t been using a backup form of birth control.

Doctor: