Advice?

[eleanorrigby.livejournal.com]

I had sex with my boyfriend using condoms until a little less than a month ago. Then we got into things one night, didn't want to break things up with the frantic condom-grab so I took plan-B the next morning. Unfortunately I really didn't know what plan-B was until recently, so I didn't think twice about doing the same thing maybe four days later. About two days after that I started taking birth control pills. During the first week we pulled the plan-B thing again, and again halfway into my second week on birth control. After two weeks on birth control we had sex without a condom, he pulled out when he came and I took no plan-B. Now I'm halfway through my sugar-pill week where my period is supposed to start, but it hasn't yet. My stomach has been feeling pretty beloted for a couple weeks now so I've been dying to start my period and end this crazy month. What are the chances that I'm pregnant? We were really really careful to use condoms everytime and correctly before all of this. Is the problem just that I have so many hormones in my body still that it just doesn't know what to do with itself? What do you think?