While there are many things that can cause bloating, you've started a great approach to finding your culprit (by identifying when it starts). Next step is to compare the days you feel more bloat with days you feel less or no bloat, and see if you can pinpoint culprits (which may be foods or anxiety or lack of restful sleep, etc.). For me, I found that too much coffee and any of certain grains cause me to bloat. But every body is different. So try to compare your good and not-good days to find your triggers, perhaps keeping notes for a couple weeks to look back and analyze.