Plan B question...

Okay so my bf and I use the pull out method. Effectively so far, since I chart and I know when my fertile window is and such. And then he won't pull out when I'm on my period.

So anyway, this last week, I was supposed to get my period on Friday, so Thursday night, he didn't pull out because it was supposed to come. And then it didn't. I gave it a couple of days and still nothing.

Monday morning I took Plan B. I had light cramping and felt like shit Monday. But here we are on the following Thursday and I still have no period. I've had some bloating and head aches and a consistent yellowy-pink discharge. I don't know what the heck is happening. And I'm nervous to take a test.

This would be baby #3 for me. But #2 is under two so I just wasn't planning on this yet. Any advice or experiences? Did anyone else actually have their period delayed on Plan B? Because they list that on the website but if it's more than a week to test. I've just never heard that before. Opinions?

*edit: I took a pregnancy test today and it was negative. About 2 or 3 hours later, I started my period. Thanks for your help, though. Even if some of you kind of talked to me like I was an idiot (which is fair I guess without the whole story, but still. Some of you should Give being a little nicer a try. Just a thought.)