It looks like you have either over stressed or had a stomach discomfort
that is common at this stage due to digestive disturbances. You need to take rest. Perhaps you may also be running some temperature. Often, when one gets sick it is common to feel feverish. There is no need to worry, yet I advice you to have a consultation with your doctor. You may be needing some anti-emetics and digestive enzymes; also you should avoid heavy food and take light, nutritious food. Take care.