I Missed My Period LMP IS 31-07-2015 Still Not Get

i missed my period LMP IS 31-07-2015 still not get period i have done pregnency test result came weekly positive how to get strong positive in test preveious i was loss my pregnency like same after 45 days i have rubella igg positive, cmv igg positive what can i do my frind told use maintain tablet or inj for one month to sustain pregnency avoid abortion can u give suggestion