My girlfriend took plan B but can she still be pregnant?

ok... ummm.... about a week ago my gf and i had unprotected . then i found out that she swicthed doctors and never got a new prescription for birth control and has been off it for like a month. she missed her period too by about 4 days (hopefully because of being taken off BC) but she could have gotten pregnant before that even tho im sure i pulled out way before i had to. but anyway.... we had unprotected and i accidently pulled out a second to late. we got scared so she took plan B correctly before 24 hours after the incident. it has now been about 6 days and she is having severly bad cramps.... almost to the point of tears. she still hasnt gotten her period tho and she is going to take a pregnancy test soon. is it possible that she is pregnant? or if not when will she get her period? just asking incase anyone else had this problem or if a doctor on here might know what to do.... thank you in advance... your help is greatly appreciated