I fasted 3 times within 8 months, 28 days, 30, and 32. I went from fasting to refeeding, and to fasting again, and then refeeding... But I did it properly. There are important details like: drinking to thirst only, avoiding exercise as much as possible in order to rest, etc. etc. That is why I believe it is important to do it properly, to read the classics like Shelton and others. Many posters in this forum do no seem to have the due education.
P.S. I am smaller than you and full breasted- no problems with those so far, just the opposite.