GH, I hope you had a good nights rest. I agree wholeheartedly with Superstressed.
Quote: For some time you wanted to believe it was not a PA and this will force you to deal with your feelings instead of clinging to the possibility that it wasn't true
I know this is how I felt when I found the Walgreens receipt for the Hallmark card. It forces you to face the facts. I was so hurt I couldn't think straight but I didn't react to my emotions. (Not until a couple weeks later, anyway).
Quote: The fact that your W thinks she may be pregnant is perhaps one reason she has been reluctant to rekindle a physical relationship with you.
Put yourself in your W's shoes for a moment. This could explain alot.
My advice, for what it's worth, is to not say anything for a couple of days. You need time to digest this information. Then when the time is right and you are not so emotional you will have to let her know what you found and give her the chance to come clean (although, don't expect her to....)