Please Answer Ladies

Tiffany

Ok so I'm thinking I'm exactly 5 weeks pregnant due to my last cycle.. but I went to the Er today to beg them for an ultrasound to ease my mind (to make sure the baby was in the right spot and everything) .. and the dr tell me that my levels are 786 and my uterus is empty and he believes I'm earlier than what I'm thinking... HOW CAN THAT BE LADIES AND WHEN WILL I BE ABLE TO SEE SOME ON THE ULTRASOUND