Well from what you are describing this can be due to a number of different conditions. the first one which comes to mind is that this could be the result of a low grade infection in the femal reproductive tract like PID. PID can occur even without pain in the abdomen or the back or urinary symptoms and can present initially with abnormal bleeding. This would need to be evaluated with a pelvic examination and high vaginal swab or a pelvic ultrasound.
Another cause of this can be related to thickening of the lining of the endometrium such as in endomterial hyperplasia. This would cause bleeding which can occur as various intervals and be irregular in nature. Simialrly endometrial or cervical polyps can cause similar symptoms without any pain.
Another cause of these symptoms can be related to pre menopause, which can cause an imbalance of the hormones although if this is due to pre menopause then it would cause symptoms like hot flashes, sweating and fatigue a little later in the course of the process. Usually initial symptoms are irregular periods and excessive bleeding or spotting in between periods. I would keep this down the list and have the other causes ruled out first off.
Lastly, A simple hormonal imbalance unrelated to the menopause can be the cause as well.
Now considering the bleeding has been continuing for the last 10 days and the irregular periods have been occurring for two months, i believe it is time for you to get a pelvic examination and also to get an ultrasound done. this will allow us to determine the exact cause of your problem. In addition hormone tests can be done if needed after the exam. i would suggest that you visit your OB/GYN and have him consider these options.
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