Your morning sickness, if caused by the pregnancy should go away a little after you have the abortion. Once your body is free of the fetus it will realize it is no longer pregnant, therefore reducing morning sickness.
Your hormone levels need time to be able to go back down to normal. You should start to feel better within a few day and return to normal within a week or so. Just hold out for a few days and take it easy in order for you to start feeling better.