Nervous and venting

This month has been hectic to say the very least. Normally I cramp like crazy a week before my period, but this time nothing, then last night I got heartburn (which I only seem to get when I'm prego), and today I've been feeling well... Off. I have an IUD, my husband and I don't use condoms, and now since my period is a day late (completely not natural for me, I'm like clockwork and always have been), he and I are both getting a little panicked. He is hoping the IUD didn't fail (I've had it for six years though) and I'm praying my body is just playing games. Le sigh. I have already made an appointment with my obgyn and am praying it's not what we both think it could be and IF it is... Well, we will just have to accept that the gods and fates want this to happen.