You're so early that I don't think a scan will confirm anything, unfortunately. They could possibly see a sac or nothing at all (both are common at early 5 weeks) and then probably tell you to come back in two weeks to see if things have progressed. That's usually the way it goes. If you had your blood level hcg tested a couple of times, that would at least let you know if your numbers are rising appropriately or not. Good luck. I had a major bleed and some double over in pain cramping with daughter and all was fine. I hope the same for you.