I’ve started doing 16:8 intermittent fasting. Generally I’ve felt really good and it seems to be working but the last 2 days I’ve felt really nauseous trying to drink any liquid in the morning. I am always thirsty in the morning but genuinely thought I might be sick after a cupful earlier. Is this a side effect? Am I doing something wrong? I just eat between 12pm and 8pm, normal foods, lots of protein and veggies.