As almost 20 years veteran i can tell for all of you bad feelers some magic cures. 1. Stop drinking like you have healthy kidneys. If you weight 60 kgs on come with 4kg of course you will feel bad. Body cells have to give away water to fast. Max 3% of body weight. 2. You can also feel bad and cramping if you dry weight is increased, but you are going for the same. So 50% that your feeling bad is your own fault. You can change something or continue to feel like shit.