Was the IUD a trial run? According to your post you had it removed when your baby was a month old. If you had it in for a long time then that might of had something to do with it, but obviously not. You are only 5 days late and are having the symptoms of getting your period, so I would just hang in there and hopefully it will come. Don't know if I have been any help but at least you know you aren't facing this alone.