HCG levels low

Hi ladies, just wondering is anyone had really low levels and went on to have a healthy baby? Im according to dates 4weeks 1 day. Took a test and came up positive. I went to Drs and went for bloods. Got results yesterday and they were 30 (according to Dr thats really low and its probably going to be a miscarriage) I have been instructed to get bloods every 48hours so they can track what its doing. Been for another blood test today and will go again on Saturday and then following Tuesday. please any help or advise or experience will be received greatly. Baby dust to all. heres my BFP.