Q&A: Could this have been a miscarriage?

This is a two part question? A little back ground info. I am 39 years old and never been pregnant before. I'm slightly overweight.

1st) I have looked at several different sites for predicting ovulation. The information was the same for all. The first of last cycle was 5/25/03 with a 28 day cycle. The different sites have given me different dates, for example: WebMD says June 1st to June 5th, Babycenter says June 1st to June 6th, and Babyzone says May 29th to June 3, with 3 different dates how would i know which date is correct? I took an ovulation test and it said that I was ovulating. So I think WebMD and Babycenter.com was closer. However, WebMD had a section if you are trying to conceive a boy or girl. Trying to have a girl would have fit into the conception date.

2nd) I was on WebMD and following their dates it was the perfect time to try and concieve. The following week, my breasts were extremely sore, very sore and heavy for over a week. Soreness like this never ever happened to me before. Soreness rarely happens to me and and if it has happened it was minor pain and not for more than a day or two. This time however, they really hurt. I could not go braless. I had to use heating pads to sleep at night. I thought I could have been pregnant. Then my period came. It came without its usual warning signal a little discomfort then 2 days later it starts. My period came on time the 16th. But it ended a day earlier than normal. I took a pregnancy test when my breasts were sore. It showed that I wasn't pregnant. Could I have been pregnant and miscarried? I joined this site in the trying to concieve section so I will be receiving the Ovulens fertility device.