Bloated, not hungry. After meals stomach feels gassy & burns. Loose stool. Symptoms go away & come since past 2 months. Something to do with my diet?

See a GI doctor. As you are aware, this is not normal, and you need to be seen and evaluated in order to determine what is going on. Not likely to be related to your diet. Good luck.
Silent infection. Looks like you have a combination of poor digestion, rotten food in belly creating putrification and burn. First step to heal inflammation use ultrainflamx plus 360 by metagenics or biohpf by biotics. Then start taking activated vitamin b with digestive enzymes by nutrametrix after each meal to completely heal this problem.