Irregular and heavy bleeding is quite common in menopause. During premenopause, the production of most of the reproductive hormones, including the estrogens, progesterone and testosterone, diminishes and becomes more irregular, often with wide and unpredictable fluctuations in levels,resulting in various symptoms like irregular bleeding, irritability and mood swings,hot flashes,night sweating, dry vagina,breast heaviness and tenderness and joint and muscle pain.
In my opinion a consultation of a gynecologist will be the best.Although irregular and heavy bleeding is a feature of premenopause,but other conditions like endometrial proliferation or hyperplasia like ovarian tumor and polycystic ovarian disease,endometrial polyps and neoplasia,endometriosis,fibroids and uterine sarcomas have to be ruled out.A diagnostic evaluation by a gynecologist is mandatory to rule them out.
I hope it helps. Take care and pls do keep me posted if you have any additional doubts. Kind regards.