Hi! This cold intolerance can be because of many reasons like ntritional deficiencies, anemia , hormonal imbalance, hypothyroidism
, raynaud's disease etc. Your second complaint of excessive menstral flow can be due to hormonal imbalance,polyps in utreus, ectopic pregnancy
etc.You did not mention whether you are pregnant or have some intra uterine contraceptive
device inserted.So you better go to a gynaecologist , get a complete blood count
done along with S.ferritin and TIBC and the thyroid profile. I hope we can clinch your diagnosis once you get all these investigations done.Wish you good health!