Hi mic0hell0e,
i've been on the pill for about a year also, also taking it faithfully everyday at approximately the same time, never missed one, etc. From everything i've ever read (and I researched a lot before I started on it), the pill is 99.X% effective when used correctly (like you seem to be doing). This means that, out of 100 women taking it correctly for a year, less than 1 will get pregnant (or, to look at it another way, 1 or 2 out of 1000 will get pregnant). But, those that don't use the pill 100% correctly are more likely to get pregnant.
From what my doctor told me (and she's a doctor on a university campus, so pretty much all she deals with is young women who are concerned about pregnancy, so I trust what she tells me), the main reason to use condoms in conjunction with the pill to to prevent against stds. So, if you're in a monogamous relationship, and you have both been tested for stds and were negative, then, while condoms are an added protection incase you fall into that <1% who will get pregnant with perfect pill use, you would probably be safe not using one. But again, this is a risk you have to be willing to take - there is a very small chance that you could get pregnant, but it is a chance nonetheless. My boyfriend (monogamous relationship, no stds) and I do not always use condoms. It depends on our mood, and how i'm feeling (i'm allergic to latex - sometimes I can handle it, sometimes I can't). I have not gotten pregnant. Granted, the first time that we didn't use a condom, I was scared out of my skin, and was convinced that I was having early pregnancy sypmtoms until my period came (which just goes to show how much faith I really had in the pill). So pretty mucn, if taken correctly, the pills prevent pregnancy. Like everything else, nothing is perfect, so there is a slight chance that you could get pregnant (but hey, if you just use condoms, the chance is even bigger). People do get pregnant when on the pill, but most because they didn't take them 100% correctly. And those that did take them right and still got pregnant fell into a very slim percentile. Like I said, you have to weigh the risks, and it's a decision only you and your partner can make.
Also, it doesn't matter what day of your pill pack that you have sex without a condom on - when you're on the pill, you do not ovualte. The hormones in the pill trick your body into thinking it's already pregnant, so no eggs are released. That's why you have to take your pills everyday - to keep up the hoax. If you miss pills, then you may ovulate, and you might get pregnant. If you take your pills correctly, then you are equally protected at any time of the month, including your week on the placebo pills, or your week with no pills (depending on if you have 21 or 28 pills).
I hope all my ramblings have helped a bit!