Thanks HV - The weight gain, bloated feeling is mostly in the abdominal area. Why do you ask?
If you are accumulating water gravity will pull it towards the feet, which would be seen as edema around the ankles. If it progresses then other areas also become edemic gradually going up the body.
Accumulation of fluid in the abdominal area (ascites) can indicate liver damage.
But bloating from gas in the abdominal area indicates fermentation. This can be from food not digesting properly, which causes it to rot, or from fermentation by Candida in the stomach. Both are indicative of low stomach acid. The fermentation produces gas that contributes to belching and acid reflux. Candida overgrowth in the intestines leads to excessive gas in the intestines increasing flatulence. This indicates low levels of intestinal flora. The flora produce acids that keep the Candida under control. The lack of flora can also cause other problems such as IBS or constipation.