Hi I Really Need Some Help About Plan B

Hi. Well let me start off by saying, just to get it out of the way.
Im pro-choice. So lets not start any debates on this now.
I just need some advice and a little reassurance.

Basicly, my boyfriend and I, we've been together for over a year now.
We normally use protection, But for the first time in a year about 2 weeks ago the condom broke.

I had gotten my last period on the 17th of april,
got over it on the 21st. So I was expecting it around the 18th of this month with a few days of leighwaybefore or after- because im kind of wierd like that.
But any way. I took Plan B within the first 48 hours. I was expecting my period 2weeks after the incident. And it skipped. however I wasnt to clear on the description of plan B. It says it stops me from ovulating, which means I clearly skip my period right? How ever, it says that you will get your next one
within a week or two of normal time. Does that mean- I was supposed to get the one in 2 weeks, or the one a month from now?
Either way im like 3-4 days late. My boyfriend and I have both been tested, And we are both clean. So Im not worried about stds.
Nor am I worried about children, so much as I already know I will not bring a child into the world that I cant support, and give the life I never had to. I want kids one day, and want them to be able to go to college, and graduate highschool. I want my kids to live life without having to fight all the time with family, and I want them to be able to have nice things. I dont want to protect them from the world, but teach them to see it as something beautiful that should be cherished. You cant do that when you have no job, and you just turned 18 ok. lol. Im just not ready.

but back on topic. I understand Plan B is not always 100% effective. I am also aware that I had probably ovulated and there was a possibility of me becomming pregnant. I also know the time it takes the sperm to get up the track, and the time pregnancy normally takes.

I also have come to the understanding that there is a possibility of it interefering with existing sperm by contacting my tubes, and also it may interfere with Implantation of the zygote into the womb.

my biggest problem is the way they word it.
I was supposed to miss my period right, and now Im waiting a full 20 something days until I get my "next" one?

Either way, Im going to take a pt In a few days.
Just to make sure.

I know it sounds like a stupid question, maybe even a little naive,
but Im just really worried, and I wanted to make sure I had my facts right.

Either way, the pill made me experience some side effects.
Dizzyness tiredness and cramping.
not good.
But I dealt with it and am feeling better for the most part.

I just want to know (i know theres a chance of me bieng pregnant no matter what and im ok with that.)
I took the pill within the first 17 hours of the accident.
How high are the odds of me bieng pregnant?
And was I supposed to skip this months and get next months instead?
thats all I was really confused about sorry to rant.

Thanks in advance. ^_^;