Ay, I totally understand your worry kasi recurrent miscarriages talaga ang nakakaanxious. A few of us sa mom group namin ay nag-Duphaston din and then shifted to Heragest when our doctors advised, at thankfully okay ang pregnancies namin, pero honestly, ang best reassurance talaga is from your OB mismo since sila ang nakikita ang full picture ng case mo. The Heragest (progesterone pessaries) ay para protektahan ang pregnancy by supporting progesterone levels, kaya yan ang goal, to help the baby stay, hindi ang mag-harm. Since you're under your doctor's care na with the spotting history mo, I think you're doing the right thing by following their plan, and if may extra worries ka, don't hesitate to message them or go back for follow-up ultrasound para makita mo talaga kung okay ang baby. Fingers crossed for you, marami sa amin nag-make it through this stage successfully din with support like what you're getting.