Yes to both. Week before I crave carbs terribly for about two days and its very hard to stay on track. I also suffer water retention and normally don't lose that week. I don't worry too much about it though as I know I am still melting the fat. The water weight tends to go the following week.
Around day 1 and 2 just before and after it starts, and the cramps are at their worst when I usually feel too sick for food, but I force myself because I feel much better after eating, obviously I would like to say I force myself with healthy options, but it NEVER is LOL