Crazy!

Has anyone thought they miscarried but actually didn’t? Ive been in limbo with the doctors for the past week! HCG levels are rising as they should, but I started bleeding Monday went to the ER and they told me they were confident I miscarried. Went to the doctors today for a follow up but they’re telling me something different! Did an ultrasound and there is now a gestational sac visible. Last time there was not.