Mama, importante talaga ang tanong mo, please check with your OB or doctor first bago i-combine ang any supplements, lalo na kung may iron (ferrous sulfate) involved, kasi may interactions sometimes na kailangan i-monitor.
A few of us moms, honestly, we always ask our doc before mixing vitamins kasi bawat tao different ang needs. Your doctor lang ang makakapagsabi ng safe na combination for you specifically. Don't hesitate to call your clinic, it's a quick question na worth it talaga!