The problem could be that you are barely eating. I am a womens health nurse
I am 5'6 and 128 pounds, I have a toned body.
I eat 5-7 small meals a day, and exercise 1.5 hours a day. You cannot lose weight unless you exercise.
How far along were you? When many women get to 5-6 months, their stomach will stretch out slightly. NOT to sound mean, but excess stretched skin has to be surgically removed, you cannot diet it away.
Many women who have had later abortions for medical reasons have the same skin stretching/weight issues that women who have given birth. It is because your body has stretched, and after a pregnancy most women will never return to a pre pregnancy state. It is better not to beat yourself up over the issue if you notice it is mostly in your stomach area.