Hi..I M 46 Days Pregnant Now....I Confirmed My Pregnancy At

Hi..I m 46 days pregnant now....I confirmed my pregnancy at the 42 nd day....and took a blood test which showed 313 mlu ml hcg quantity...my doctor said that was a very low level of hcg at 4 weeks..she asked me take a vaginal scan at the same day and told that she could not see any baby but some blood clot..she asked me to come after 10 days to have another scan so that there ll b 50 % chance of seeing a baby..she suggested me choriomon injection as well as duphaston tablets and folic tablets....I normally have irregular periods....please give me a detailed solution regarding this