Freaking out!

Jade
So i had my bloods done 2 weeks ago and hcg level come back at 6. Dr said i wasnt pregnant but started getting faint positives just a day later. Was at hospital yesterday cause of spotting and had my bloods done again they came back at 4920. Dr has said either the lab has made a mistake 2 weeks back or could be multiple birth. I dont have my scan until tuesday im so scared i know il be so lucky to be blessed with 2 but must be soo hard! Has anyone had this happen to them?