Are you also adding Magnesium to the mix? They work WONDERFULLY in combination. The recommended ratio is 2:1 (basically half). So, for you, you should take 2,500 Magnesium WITH the 5,000vCalcium ~ I am assuming this is in milligrams...... Or in a combination supplement CAL/MAG. Taking that much Calcium alone (without Mag) may be useless to you. Good Luck to you!
~ I am NOT a licensed physician, please do not construe this suggestion for Medical advice~
my dr told me to drink 6-8 glasses of water each day and take magnesium
Are your Magnesium and Sodium levels ok?
I have druken tonic water in the past for muscle cramps and it helped me.
You should definitely be consulting your physician about this.
If they do not get better, I would certainly see your doctor. You say the cramps are not in the usual places, well, that should be checked and a few tests should be run as well to rule out anything serious.
I hope this helps, good luck.