Hi Mama D
Could you see your early pregnancy unit for a scan? If you've not bled for 3mths you would naturally assume you'd be around 12wks by now. A scan could confirm all your questions 1 - Are you pregnant?, 2 - Is pregnancy progressing normally? (is baby where it should be, heartbeat visible), 3 - How far along are you based upon size of baby?
It is scary when things happen differently but that is the nature of pregnancy, every time is unique & what happened once may happen differently next time around. Best wishes & good luck