I am not surprised you felt dizzy on a cleansing program without food, considering your anemia! There are different causes of low red blood cell count. What is the cause of your severe anemia? Are you currently getting effective treatment for this, not just the symptoms?
I recommend you find a qualified naturopathic doctor or nutritionist to work with you. For instance, I might recommend three unsulphured dried apricots a day, 1-2 teaspoons of blue green algae or chlorella daily, and other easily digested sources of iron, although this helps with iron deficient anemia, which may not be the root cause of why you are anemic. These foods will at least support your energy levels. Generally, powders and liquids are more easily metabolized than tablets.
A cleansing program such as the Revive 5 Day Kit can be taken along with light, nutritious meals. Complete fasting is not in your best interest, at least not without professional support.
The key is to take it slowly and be gentle with yourself. It is natural to feel some fatigue while cleansing, so more rest is required. However, extreme weakness and dizziness are not signs of healing. You are worth the investment in yourself to get personally tailored health advice that takes your total wellness into account. I sincerely wish you success finding a long term solution to your concerns, and thank you for incorporating a cleansing program into your excellent self-care.
Amanda McQuade Crawford