Spotting at 21 weeks pregnancy with twins

Sino po dito same case sakin? Pregnant with twins. Nagspotting po ako nung 19w 3days at ngayon po na 20 weeks at 6 days..very light lang naman po at nakukuha naman after 1 day..Palagi po ba talaga may spotting kapag twin? Isoxilan at duphaston po iniinom ko everytime may spotting po..