Water fasting. Help!

Hi! I'm new to the site. Not new to the contents of it though. I have been researching Water Fasting for about a month. I'm pretty well educated on the subject.. I am wanting to fast for the health benefits, to humble myself spiritually, if that makes sense, and of course lose weight. I have tried to fast about 3 times the past month. Every time it turns into a liquid fast. And what's terrible is I usually cave into energy drinks. I have a one year old I have to chase around the house. I have cut down my caffeine intake tremendously. But I suffer from depression, PTSD, and anxiety, and I'm told that has a lot to do with my exhaustion.. I guess I am looking for someone to tell me it is possible to fast and not have to be on bed rest to do so. That just isn't an option for me. I also was curious about what you guys think about taking a daily vitamin or supplement during the fast. I don't want to give myself a time frame. But I would like to do 40 days of water fasting. Assuming my body allows. I am starting tomorrow. Its so difficult having the will power to follow through. I admire those who have been successful! I am 21 years old, 5'1" and weigh 127 pounds. I am very unhappy with my appearance. Before my daughter I was 95 pounds. I am also a recovering drug addict and getting clean has definitely put some weight on me, it seems. I feel like my early attempts this month were not successful because I only had weight loss as my motivation, and I am hoping now that I have read more on the benefits of fasting, emotionally, mentally, physically, and spiritually. That I may be successful this go around. I would love as much input as I can get on the subject. I really want to do this for God. I feel like I need to, I want that spiritual connection that has been gone for so long. I am also hoping to reset my eating habits. I'd like to go raw vegan after the fast. I know I wrote a lot lol. Just kind of venting. I also have the issue of family trying to feed me. Coooonstantly. They know my goals to fast and I feel as if its always sabotaged. Its hard enough for me to deny myself food and have to fees my daughter everyday but having my family try to feed me makes it so much more difficult! Anyone else have these problems,?? How'd you handle them?