I would be inclined to check with your Dr and Dietitian before resorting to the supplements. The reason for that is that Calcium CAN be contraindicated for some health issues, and also when we take meditation - even some OTC meds.
There are many other ways of getting calcium into your diet. Some examples are:
Canned Salmon with the bones in
Canned Sardines with the bones in
Dark leafy greens like spinach, kale, turnips, and collard greens
Fortified cereals such as Total, Raisin Bran, Corn Flakes (They have a lot of calcium in one serving.)
Fortified orange juice
Fortified soy milk or other alternatives (Not all alternatives are a good source of calcium, so it's best to check the label.)
Enriched breads, grains, and waffles
Below is a link with more, AND the calcium content: www.iofbonehealth.org/calcium-rich-foods
As a warning - there are studies out which show that some people are at risk of heart issues by taking Calcium Supplements. My own GP instructed me to take a 1/2 tab rather than a whole one because of this. I don't have heart disease, either.