I have read some things that say from my journey with candida website and this website that say leaky gut is not a stand alone illness and is often the result of other issues like ibs. The lady who writes the my journey with candida website talks in detail about her leaky gut experience and her parasite cleanses.
It is suspected that leaky gut may be attributed to weight gain but it is still being researched.
Many parasites cause weight gain including flukes. It also makes it very hard to lose weight. If you read a response I was given to one of my posts you will see a number of parasites causing weight gain.
I should say I had unexplained weight gain and since taking humaworm I have been losing weight consistently.
I do not know if I have acid reflux but I have been vomiting thick white froth for days now after every meal and I feel constantly full. I am on about day 17 of a humaworm cleanse. There are people in this site who have experienced acid reflux as part of a cleanse.
I have no idea why your reflux is flaring up but hopefully a very knowledgable person on this site might be able to answer you.