Calcium During Pregnancy?

I have been taking my calcium pills on and off throughout my pregnancy. Im 34 weeks now. I think its been about 3 months or so since I've taken my calcium pills. Is this bad for the baby? It's not like I dont want to take them I just forget because Im taking iron pills (for anemia), and pre-natal vitamins and I cant take them together because it makes me sick....so I forget about the calcium pills.