can someone help me? Maybe Somer?

Hello,
I start The Master Cleanse tomorrow...the 25th. I have done it like about 4 times...EVERYTIME I get to day six. I give out. The last time day six was right before my period...my heart tends to race a have some palpatations, and I feel if I don't eat I will literally die. I don't understand this and it upsetsme so...to not even be able to go 10 days...I do good the first of it,,,yes have some cravings and feel a bit weak at times, but feel normal. I always drop like 2 pounds a day for all those six days, I don't have heart problems or any serious illness. I want this next fast to be a success, meaning at least the ten days, I also did drink more lemonade but maybe I am skimping to much on water?? Has anyone had trouble with day six? Or have anyadvice to help? I do eliminate fine also..from the saltwater flush and tea, so it isn't that.
Thanks so much...Kelly Tweet