Hi momsh! Honestly, it's better to check with your OB kasi every pregnancy is different, some doctors prefer specific brands or dosages, especially when you're combining vitamins. A few of us mums tried doing our own mix and it turned out our doctors wanted us on prescribed ones instead kaya mas safe talaga to confirm with your ob-gyn if ang current vitamins mo ay complete na with the folic and ferrous you need. Congrats on 22 weeks!