Thanks for the query to H.C.M. Forum.
Concomitantly three things are going on.
1 ovarian cysts on both side , so pain on both sides of ovaries .
The weight gain is associated with ovarian cysts.
2 Stomach pain , pain around sternum
, chest pain
may be due to hyper acidity and tension is the reason of this hyper acidity.
3 Due to age factor there is perimenopausal syndrome , so hormonal
imbalance is responsible for various type of cramps.
Consult a gynaecologist and get his opinion.