This cannot be implantation
bleeding as implantation wouldnt have occurred by now and implantation bleeding occurs approx. on 13th day after fertilisation. You must be trying to conceive this time as you have had intercourse around ovulation time and considering the previous miscarriages. You need to take care this time. Do a Urine Pregnancy
Test at home at around the time of your next periods and consult an obstetrician. Once there is fetal viability on scan (6-7 weeks), you need to be given progesterone
injectables and tables/ suppositories for maintenance of pregnancy. If, however, there is no pregnancy, you need to be investigated for repeated miscarriages. Also, start taking folic acid
tables 5 mg once daily.