25M diagnosed hiatal hernia at 19.

I am young to have HH and have LPR not heartburn or typical acid but 24/7 LPR. I used to have chronic constipation as a child for many years, mostly self inflicted from witholding and megacolon. I am told this is common in autistic children. That dosent affect me anymore and hasn't since I was about 9 I think but I have HH.

I don't know if it was caused by that but online seems it could be. Is there something I can do as PPI's just give me loose stool and even if I try them for a week and go back on them I have a month of loose diorreah. I have just bought gaviacon advance. First time hearing about this liquid as gaviacon double action tried for years and does nothing. Will try 3 times a day for a month.

I am also starting back up iqoro I wish I never stopped. I stopped as I am forgetful then tend to get in bad habits.

Does anyone have any advice? Also for such a young age any comments on causes of HH and if I can somehow work to reverse it?