does anyone else get cramps from it? I've tried taking it on a few seperate occasions. And each time I usually end up getting stomach cramps. The D does seem to slow down, but the cramping doesn't. I'll feel fine for part of a day, and then when I have to go and suddenly the appocalypse begins, and it's in my stomach. I usually go fairly normally, but it's a bit painfull before hand. I want to be positive about this calcium because it seems to be helping a lot of people, and I'll take any help I can get. I usually try to ease my way in with the calcium, taking half a pill at a time, though people here mention they're taking up to 3 of the 600mg pills a day. Anyways, just wanted to see if anyone had any similar reactions to it.