Miscarriage

Hi everyone. Im abt 4 to 5 weeks. However the past few days hcg measured 29, 26.1 n yesterday was 21. Started bleeding yesterday. Went to o&g, they said pregnancy not viable. However, bleeding is getting lighter for a miscarriage. Even my normal period will be heavier. Anyone has any knowledge and advise on this? We r still hopeful though 😓