Probably TMI

Hannah • Momma x2 💗💙
Just kinda curious if anyone else has experienced this. But I've been taking my prenatal vitamins regularly as I am ttc. I have had SUCH bad constipation. Not just like "oh darn I can't poop". It's causing awful stomach aches. I feel like I haven't had a decent poop in a couple days. 
Has anyone else had this sort of problem while taking their prenatals?