Listen, you have gone through a lots of body changes during your pregnancy, and at this age metabolism is also gets too slow due to which many problems are there. You also have gall bladder stone of 9 mm you mentioned, try to remove it as soon as possible, and if don't wyto remove and having no problem then try to avoid oily and spicy food, even dot take outside food, try to focussed on normal diet
Next Steps
try to take normal diet and light walk or exercise might be helpful