I have been vegetarian all my life. In the last 6 months, I took control of my nutrition eliminating junk and fatty foods. Targeting fruits and multiple meals like vegetarian burgers, dry fruits, milk, protein powder through course of the day. Usually, I will fast as well once or twice a week and focus on fruits and protein only for the day. Exercise program where one day I will perform high intensity body only exercises followed by weights next day. I did good in the beginning losing 10 lbs and 3 inches off the waist.

Now for some reason, I have gained all that weight back and my waist is increasing as well. Confused. Any suggestions. Recommendations.

Hello, I would try cuting out the milk, try a brown rice protein powder. I also would cut out the veggie burgers and focus on greens & quinoa as your protein. Veggie burgers are ok as a treat food but because they way they process them they have high amounts of soy isolates which is hard on digestion. Try seitan instead.
I fast once a week on juices..
I do know alot about vegan nutrition, its my job.
best to ya