Negative pregnancy tests, but still two weeks late, atleast?

So I went off the pill in May 2011, in preparation for my husband and I starting to try and conceive this month. Since I have been off the pill I have had 3 day periods about every 28 days with some cramps. At the beginning of September my period was very light hardly any cramping, and only two days long, I didn't think much of it, and now I am a week and a half late in this cycle and on like day 43 of my cycle as opposed to the usual 28. I took 3 tests last week, all negative, I took one in the morning and two later on in the day on different days, and another this evening which was also negative. I made an appointment at my doctors for blood work. So I am not sure if I am preggers, or just not ovulating. I keep feeling like I am going to get my period, but it doesn't come. I am broken out, sore breasts, especially the nipples, and a little bloated. No sickness or nipple colou change. If I got preggers I am thinking it would have been in august around the 19th, we had a condom fall off and i was ovulating that week, but nothing here seems to be text book. Do the tests not always work? I would be almost two months if I was, and you would think that would show up by now! Very frustrated!