Teen Pregnancy Forum - birth control mix-up

Okay so here it goes:

I am 15 years old. I live in a urban city where teenage pregnancy is pretty much an everyday thing. Most of it occurs when they get to high school, but it won't be much of a surprise of you see a 7th grader with a buldge. All three of my older sisters got pregnant before 18; only one finished high school.

Due to the large percentage of pregnant girls, doctors and teachers etc. try to inform us on how to protect ourselves. I remember getting my first sex talk in the 5th grade and then two more the following years until they offered us condoms in the 8th.

I took it more seriously than pretty much everyone else. I got on birth control 5-6 months before I lost my virginity (which was a year ago).

And Recently, back in October, my doctor upgraded my pills to a stronger brand due to constant spotting. You're supose to wait a full week whenever you change your birth control prescription or risk unplanned pregnancy, which I knew and understood completely. (My sister messed up on that one.)

When I started running out of placebos in late October, I called up my pharmacy and ordered a refill using a barcode they have, not the actual pill's name. My mother, who knows I'm sexually active and has met my boyfriend, went to pick it up. They told her that they never recieved a prescription order from me.

Now, my mother was given two choices:
a) call me and ask for the name of the birth control I'm currently taking
b) or guess

She guessed (picked the wrong one) and didn't tell me a thing about the incident. I'm pretty sure that in other pharmacies, you'll notice if you get the wrong prescription but like I said, I live in a city. They give us our birth control in these flimsy cheap packets that often tear. On the flap of the packets, they place the prescription sticker but they write the actual drug name in the teeniest letters on the bottom left corner.

Of course, I didn't notice. I thought I was getting the pills that I've called for and my mother was just the delivery person.

The first day of the new prescription I had unprotected sex. Then again, two days later; he came inside both times if you're wondering.

Two weeks after that, I spot bled for 2 days. I didn't get my period on the placebo week.

I started calculating things out and counting days when my eyes somehow landed on the prescription name. It was the wrong freaking one; I asked my mother what happened and she just told her story as if it wasn't a big deal. She doesn't have an idea what she just did. But I stayed quiet.

I switched back to my regular pills and waited a month for the placebo week. I got my period a couple of days late, but it seems like a regular period.

Could I still be pregnant? I've heard that some girls still recieve their period while they're pregnant.

Personally, I think it's more of my mother's fault than mine. Yes, I should have analyzed my packet more but like I said, I've been on it for a year, I had a routine to this. We both had a routine to this. It's not like I hid my sex life from her neither. She definately knew.

Kind of sucks, ehh.