Calcium Carbonate, is it advisable to take this vitamin for breastfeeding mom like me?

I am a first time mom. My LO is going 4 weeks old and after delivery I haven't taken any calcium supplement, only multivitamins such as Stresstabs as per advised by the hospital where I delivered my baby (SPMC). I still have my calcium supplements left that were given to me by our barangay health center. Is it okay to take the calcium supplement along with the multivitamins? Answers are highly appreciated.