Scanty periods

Hi , I am 35 yrs old and has been facing the problem of scanty periods with dark blood and very painful periods (especially first n second day). I have this problem from past few years.. dr says its normal but I don't get a good feeling about it as my periods last for just a day , sometimes half day n sometimes just spotting for two days. From past few months i've even getting mood swings just few days before my periods . That time i feel irritated, low, gets angry very easily and sometimes too depressed and anxious.
I am hypothyroid from past 8 yrs and take 75mcg of thyronorm, sometimes get low bp but taking no medication for that. I am overweight 5'3" height with 80 kgs of weight. Trying to lose weight from past few months but not able to lose even joined gym. I usually like spicy food but now a days even crave for sweet food.I've two kids both born by csection , 1 d&c surgery and 1 ectopic pregnancy in which my right fallopian tube was removed. In summer i feel too hot and winters my hands , feets are too cold.
Please help!!