Hello! ? I haven't been here for two months, ? missed the questions an…

Hello! ? I haven't been here for two months, ? missed the questions and advice. ? How are your affairs? Now to the question recently started menstruation, they come as usual, don't stain. I'm still very swollen, though I drink 1 liter of water. I wanted to know through the chat about menstruation? And how long do you last? Do you swell up too? And what is the cause?