Thanks for your query.
Spotting continuously is not normal, and your low lying placenta could definitely be a reason.
Others could be impending miscarriage
, deranged coagulation profile etc.
You can take Uterogestan continuously, as it is a progesterone
preparation and will support the pregnancy
Do not exert/strain yourself.
Avoid bending/jerky travelling etc.
Avoid standing for prolonged periods
Avoid sexual activity for the time being.