I've been fine all day. Chest and throat a bit sore and crackly but otherwise ok. Ten minutes ago I suddenly felt tired and lightheaded. My eyes are heavy and I feel like I'm going to throw up. I'm lying on the sofa to see if it will pass but I feel a bit 'spaced out'. DH was talking to me and I couldn't take in what he was saying. I've had to turn the brightness of my phone right down and turn off the lamp as it's making me feel sick. Anyone know what it could be?