Thanks for the query to H.C.M. Forum.
Two things are simultaneously going on.
Peri-menopaual syndrome and hyper acidity. Stomach bloating
, fullness , stomach ache, all are due to hyper acidity.
Irregular bleeding and bloating are due to perimenopausal syndrome.
Consult a Gynaecologist/ physician and get their opinion. Hormonal
check up is very important particularly estrogen
level and F S H / L H levels.