Hey Radders,
I previously had a bit of a caffine addiction which was fuelled by diet coke- knwing how bad this was I decided to cut it out for a while as I seemed to be suffering from bloating and water retention. I used a couple of big 1 litre water bottles and made it an aim to drink at least 2 litres a day. The results I found were I felt less lethargic, less bloated during that time of the month and generally and also my boobs didnt go through the pain like before.
I have read drinking more water at that time of the month reduces water retention and it seems to work for me.