If your periods have been more or less regular and if you have no signs or symptoms of any sort of infection, pain, cramping, discharge other than
menstrual blood, it would be my humble and non-medical opinion that you are slowly but surely heading into perimenopause. This does not mean that next month you'll in full blown menopause! Perimenopause is the beginning of our bodies learning to live with the ups and downs of fluctuating estrogen levels. Perimenopause can last for many years.