Hello. im going to start a 3 day fast, and only consuming water within those 3 days. the only health problem i have currently is gerd, and anxiety. am i still able to do this safely?

What do you expect to accomplish from a three day fast? If your aim to lose weight, you need a longer term plan than short term fasting. It is likely that you can do it safely, but it may not be effective for what you are trying to achieve. Wish you good health!

Since you will not be eating than you won' have to worry about GERD. You may get anxious if you get hungry so drink water. During this fast, stop if you have any ill feelings, and eat some proteins and drink some sport juices.