Hey Hun I’m not sure about them fluctuating at time of the month as I’m only 10 days post op, got that to experience I suppose lol, my monthly started the day after surgery and as I was early days didn’t notice anything different, good luck for tomorrow Hun, it’s amazing how sentimental you feel about your boobs isn’t it? I was exactly the same but definitely don’t look back now, I had 50occ and love the size, all the best, new boobies here you come x x x