Well thanq for ur question, Firstly I can suggest u be cool.... Becz in 6th week of pregncy ur mental status and worries make u to bleed more... Notice a tiredness, low back ache or low and pain while shooting, kind of thirty and discomfort. Sometimes some patients will have   monthly spotting without pain during their cycle time.. It's natural.. As u underwent for sonography, and doctor has already given u a absolute choice of treatment which helps in stoppage of early miscarriage, as doctor told u cnt given assurace becz minimum it needs 8-10weeks  to get implant in ur uterus completely and depends on its blood supply and growth, if  baby heart beat begins well... In cmng another 15-20 days surely they can tel u something .. .  Till tat be on sustain 400 mg and complete bed rest... Hope this will help u.. With regards...

just go for anc checkup