A healthy weight for your height at a medium body build is between 121-135. Even a small frame the optimal weight would be 111-125.

If you don't know what frame you have, you can go http://www.healthchecksystems.com/h...chart.htm#frame to check.

I would try a goal weight of 115 to 120. With the tummy issue, have you been checked by a doctor for PCOS?