I'm loosing my babies

sarah
Hi all .. I don't know from where to start..I'm 8+1 weeks pregnant or I guess I was pregnant.. my case is went to the doc last week, had an ultrasound n she found out last week that i had 2 sacs.. I was 7 weeks 4 days pregnant and the sacs measured 5 weeks 4 days (this was last week) had my hcg levels checked but unfortunately they are not doubling jumped from 19000 last Saturday to 21000 this Saturday only .this week the sac is 6 weeks and I'm 8 weeks pregnant as per lmp.. doc told me prepare for mc .. note that she didn't find a heart beat .. so does this mean I'm losing the twins or should I have some hope ??