Madam,
Thank you for the feedback and answers... Glad to hear you're CH pain free. Now we need to address the GI tract disturbance... My first inclination is for you to drop back to an initial vitamin D3 maintenance dose of 10,000 IU/day to see if that has any effect on the tummy problems. If there's an improvement after a week, you may be able to throttle back to 5,000 IU/day vitamin D3. Let's give that a go...
Check the back label on the cal-mag tablets to see what kind of magesium salt is used. Magnesium citrate tends to cause the GI tract problems you're experiencing.
Take care, cheers and please keep me posted.
V/R, Batch