Hypoparathyroidism and constipation from calcium supplements?

After thyroidectomy, I must now take daily calcium and vitmain D since my parathyroid glands aren't functioning properly. I struggle now with constant constipation, bloating, and gas. I tak daily magnesium and that helps move things through temporarily, but by the end of the day, I'm all backed up again.

I'm taking calcium citrate powder capsules. I eat lots of foods containing calcium, I space the calcium supplements throughout the day, I way, also. Any suggestions on calcium supplement types that help with this?