Hi Dr. Purushottam welcomes you to HCM virtual clinic. I have gone through your query. I think I have understood your concern, I will try to suggest you the best possible treatment options. Most of the times this naval displacement is because of laxity of abdominal muscles. as of now , you are 6 months pregnant so we can not advise you abdominal muscle toning exercises. But still I will suggest you--- 1. Not to bend forward 2. Not to lift heavy weights 3.Not get up briskly from lying down. 4. Not to indulge in exertion causing walk. Please do not worry , post delivery start doing abdominal muscle exercises, such as leg raises, crunches, sit ups and core training exercise. I hope my answer helps you. Thanks.