Hcg levels

vickie

So I had a scan and I'm 5+1 they saw a sac but no baby and said I have to go back in 2weeks but I'm really scared coz they said my hcg are going up but not doubling and they said I'm highly likely to loose this baby, does it nessicarily mean I will loose baby if levels are going up but not doubling??? It went from 2300 to 2900