I'm super early in my pregnancy - roughly 7 weeks - but the nausea and exhaustion is debilitating. The nausea is so bad it's waking me up in the night and is not letting off at all through the day. I can't keep myself awake and feel like I need to sleep all day. I fell asleep just sitting upright at my desk last week. I'm trying to manage the nausea by snacking on bland food and keeping hydrated but it's not working. I feel really uncomfortable letting work know that I'm pregnant and that I'm struggling to do my job - it's quite a demanding job involving teaching to large groups. I suppose I feel embarrassed that I'm only 7 weeks and am causing problems for them already. Do people just drag themselves through this period and accept that quality of work will slip, or is it common to get signed off?