You have autoimmune hypothyroidism
( since your Anti TPO is 500). Nothing to worry. You will have to take thyroxine for life long. PCOS need weight reduction and exercise.. Avoid fatty food, Reduce carbohydrates,. Check your sugar levels. Once your thyroid is okay, check blood prolactin levels ( if not done already). Fatty liver
is because of excess weight. Gas formation is quite common in obese people.
Once gas problems are over, please meet an endocrinologist
who cam help you with PCOS, irregular periods
, weight gain and thyroid issues