I am 39 years old. this is the last day of my period which normally last 3 days. i woke up this morning with lower back pain and brownish bloody mucus like discharge. could this be associated to my period or am i experiencing the beginning stages of meno

Early for menopause?: I'm not sure I'd jump to that conclusion based on what you've said. No, let me rephrase- I'm SURE I wouldn't jump to that conclusion based on what you've said. Is this the 1st time you've ever had such a discharge? I suggest a visit to your primary doctor. They may wish to order a urine test and if necessary a visit to the OB/GYN. Good estimate for menopause when mother or sister began.