Uhm, okay.. so I was expecting my period on March first and it never came, I got it March 5th, and then it stopped March 9th, today is now March 17 and I have it again...
Here my concern, I have unprotected sex on the 11, once I got home I took one step plan B I spoke to my health clinic they said it was nothing.. Is there any possible way that I can be pregnant ? I'm just freaking out, and I can't go to my mother about it cause she'll freak out.

Having a period is normally a sign you are not pregnant,

Plan B has many side effects, was this a full period, or just spotting, or just one day ?
Plan B of course is not 100 percent effective,

Plan B will effect your periods and cycle for one to two months.