HI Cammieb
Have you spoken to a nutritionist? 115 pounds at 5'7" seems pretty low to me, as does 1200 calories. Are you working out? If you are, then you definitley need more than 1200 calories. Eating too few calories can mess up your health in different ways than eating too many!
If you have health insurance, you can speak to your doctor to get a referral to a nutritionist. The nutritionist can help you get on a plan that will help you plan out your food and get the right amount of calories. It sounds like you could use some extra support.