Twins about 2 weeks apart :(

At my 8week scan, we were told that baby b is measuring 2 weeks behind and no heartbeat :( I know this is very hopeful thinking, but I go for my next follow up scan soon (11 weeks) and hoping to god that baby b was just to small for a heartbeat at the last scan... I'm so very nervous, scared and heartbroken... I've wanted twins my whole life !