birth control or pregnant?

Tamarra
So I started my inactive pills this week and I was supposed to get my period on Tuesday and then I figured maybe Wednesday. It's Thursday and idk what's going on. I felt cramps last week and a little this week but nothing still. 
I've been using protection each time I have sex and have been taking the pill on time. I'm not sure what's going on. 
Any help?? Or advice? 
I took plan b a month ago along with my new pack of pills. Could  that have done something?