Feeling sick and vomiting are common symptoms of early pregnancy. There are various theories to explain why morning sickness occurs; one is that it's due to the rising levels of hCG (human chorionic gonadotrophin) hormone during the first trimester. Morning sickness, unfortunately, doesn't only happen before breakfast; in fact it can happen at any time of day and more than once in 24 hours.
One of the greatest challenges of early pregnancy is keeping it a secret from colleagues. If you have to keep rushing to the bathroom to vomit, people are likely to become suspicious. They may also notice that you look unwell or are more tired than usual. To help you handle this, you may want to tell one or two colleagues or your boss. You could ask them to keep it a secret for the time being. It's a good idea to keep some face wipes, toothpaste, and a toothbrush in your drawer, together with any snacks that you have found help to ease your nausea.
If you're finding it difficult to handle your vomiting, or are worried you are vomiting too much, seek advice from your doctor. Rarely, the sickness can become more serious and require medical treatment (see You are 8 Weeks and 3 Days).