In my experience, Algin can be taken as often as needed. Since it simply passes through the body, I don't believe you can really overdose on it. Just make sure you drink lots of water to keep your bowels moving, otherwise you could develop some constipation. But I've taken 20+ capsules in one day and never had any problems or constipation.

Regarding coffee enemas, I've never used them, nor do I know a lot about them. However, my concern is that I wonder if your body is absorbing caffeine through the intestinal lining? According to Dr. Boyd Haley, caffeine enables mercury to readily pass through cell membranes. Maybe this is why you've been feeling worse...the coffee enemas are enabling more mercury to enter your cells and do its damage.