Obimin Plus

I've been taking them for more than a month now as prescribed by my OB. Kaso 2days ago it got stuck on my throat nung ininum ko causing me to almost vomitt. Since then di ko sya mainom kasi feel ko magsusuka ko ulit. :( medyo malaki kasi yung obimin compared sa folic acid na naiinom ko naman ng walang prob. Huhu. What shall I do?