Period 2 weeks late after plan B

My girlfriend and I had sex in late august, around the 28th, it was the day after her period and I pulled out. the next morning i got the Plan B pill just be safe and about 4 days later she bled for a few days.  she expected her normal period in early October, around 1-4th but she still hasn't had it. and i was wondering if this could be Plan B causing it or should i be worried?   also She isn't the most regular. when she became a vegetarian she didnt get a period for like 2 months. but here it is October 16th, and she still hasn't had her period. she is also kind of stressed and she hasn't taken a HPT yet. but i would like as much feedback as i can get because she can't go to a doctor for it, doesnt want her mom to know. she is only 16.

[mmmaria310]

hey did things with ur gf turn out alright? did she get her period?