I started feeling a bit funny on Monday at work. Had to keep going as Tuesday was my last day at work before breaking up for Christmas. On Wednesday I was flying with my son to my parents. It’s Sunday now and since I arrived I have been feeling dreadful. Weak, ligh-headed, sleeping badly, occasionally a bit nauseous, first two days with brain fog - now a bit better. I am lying down all the time. I seem to be feeling a bit better in the evening but in the morning I feel awful again. Has anyone experienced anything like this?